International Conference on Advances in Physics 2015Mr. Soumitra Banerjee, TSCC, RU . International...

International Conference on Advances in Physics 2015

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WE are grateful to the following organizations for their sponsorship and

contributions to The International Conference on Advances in Physics 2015

Islami Bank Bangladesh Ltd.

Pundro University of Science and Technology

Jalalabad Ragib-Rabeya Medical College and

Hospital

University Grants Commission of Bangladesh

PRAN Foods Ltd.

Bangladesh Energy Regulatory Commission

Bangladesh Atomic Energy Commission

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&sqi=2&ved=0CB0QFjAA&url=http%3A%2F%2Fwww.islamibankbd.com%2F&ei=IFUpVbeeBZeJuATqrIGIBA&usg=AFQjCNEMmGOh6FHYfIySzrPUpw-HaadrGA&bvm=bv.90491159,d.c2E


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Contents

1. International Advisory Committee

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2. Organizing Committee

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3. Sub Committees

5

4. Programme Overview

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5. Programme with Abstracts

12

6. List of Registered Participants

81


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ICAP 2015 Committees

International Advisory Committee

A A Ziauddin Ahmad BRAC University and President, BPS, Bangladesh

Arun K Basak University of Rajshahi, Bangladesh

John R Cooper University of Cambridge, UK

Saiful Haq University of Pittsburgh, USA

A K M Azharul Islam IIUC, Chittagong, Bangladesh

Vladimir Kravtsov ASICTP, Trieste, Italy

Syed M Qaim Forschungszentrum Jülich, Germany

Amitava Raychaudhuri University of Calcutta, India

Isao Tanaka University of Yamanashi, Japan

M Alfaz Uddin University of Rajshahi, Bangladesh

Organizing Committee

Chairman Prof. M Aminul Islam Department of Physics, RU

Co-Chairman Prof. Somnath Bhattacharjee Department of Physics, RU

Members Prof. Emeritus Arun Kumar Basak Department of Physics, RU

Prof. M Ali Asgar Member, BPS

Prof. M Abu Hashan Bhuiyan Vice President, BPS

Dr. Dilip Kumar Saha Secretary, BPS

Prof. M Shafiqul Islam Department of Physics, RU

Prof. M Obaidul Hakim Department of Physics, RU

Prof. M Enamul Haque Department of Physics, RU


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Prof. M Golam Mortuza Department of Physics, RU

Prof. M Mozibur Rahman Department of Physics, RU

Prof. M Khalilur Rahman Khan Department of Physics, RU

Prof. Irine Banu Lucy Department of Physics, RU

Prof. M Rafiqul Ahsan Department of Physics, RU

Prof. F Nazrul Islam Department of Physics, RU

Prof. Saleh Hasan Naqib Department of Physics, RU

Prof. A K Fazlul Haque Department of Physics, RU

Prof. Abdullah Shams Bin Tariq Department of Physics, RU

Dr. M Rezaur Rahim Department of Physics, RU

Prof. Dr. M Habibur Rahman Dean, Science Faculty

Conference Secretariat

Secretary Prof. Saleh Hasan Naqib Department of Physics, RU

Joint Secretary Prof. Abdullah Shams Bin Tariq Department of Physics, RU

Members Dr. Raihana Shams Islam Department of Physics, RU

Dr. M Abdur Razzaque Sarker Department of Physics, RU

Dr. M Monirul Haque Department of Physics, RU

Dr. M Atiqur Rahman Patoary Department of Physics, RU

Mr. K M Mahmudul Hasan Department of Physics, RU

Ms. Monira Jannatul Kobra Department of Physics, RU

Registration, Reception & Information Committee

Convener Prof. M Shafiqul Islam Department of Physics, RU


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Members Prof. M Enamul Haque Department of Physics, RU

Prof. M Mozibur Rahman Department of Physics, RU



Dr. Laila Arjumand Banu Department of Physics, RU

Mrs. Dilruba Akter Banu Department of Physics, RU

Mr. M Masum Billah Department of Physics, RU

Scientific Committee

Convener Prof. Emeritus Arun Kumar Basak Department of Physics, RU

Members Prof. M Aminul Islam Department of Physics, RU

Prof. M Obaidul Hakim Department of Physics, RU

Prof. Somnath Bhattacharjee Department of Physics, RU

Prof. M Golam Mortuza Department of Physics, RU

Prof. M Alfaz Uddin Department of Physics, RU


Prof. F Nazrul Islam Department of Physics, RU

Prof. Saleh Hasan Naqib Department of Physics, RU


Finance Committee

Convener Prof. F Nazrul Islam Department of Physics, RU

Members Prof. M Khalilur Rahman Khan Department of Physics, RU



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Dr. M Samiul Islam Sarker Department of Physics, RU


Mr. M Leaket Ali Department of Physics, RU

Souvenir and Conference Materials Committee

Convener Prof. M Rafiqul Ahsan Department of Physics, RU

Members Prof. F Nazrul Islam Department of Physics, RU

Dr. M Rezaur Rahim Department of Physics, RU

Dr. Raihana Shams Islam Department of Physics, RU

Dr. Fahmida Parveen Department of Physics, RU

Prof. M Alfaz Uddin Department of Physics, RU



Mr. M Ismail Hossain Department of Physics, RU

Publicity, Media and Web Committee

Convener Prof. M Mozibur Rahman Department of Physics, RU

Members Prof. A K Fazlul Haque Department of Physics, RU


Dr. Fahmida Parveen Department of Physics, RU



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Administrator Public Relation, RU

Food and Accommodation Committee

Convener Prof. F Nazrul Islam Department of Physics, RU

Members Prof. M Rafiqul Ahsan Department of Physics, RU





Dr. M Samiul Islam Sarker Department of Physics, RU

Mr. M Alamgir Hossain Department of Physics, RU

Transport Committee

Convener Prof. A K Fazlul Haque Department of Physics, RU

Members Prof. M Mozibur Rahman Department of Physics, RU



Mr. A F M Abdul Wahed Department of Physics, RU





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Session Management Committee

Convener Dr. M Rezaur Rahim Department of Physics, RU

Members Dr. Fahmida Parveen Department of Physics, RU








Cultural Program and Volunteer Committee

Convener Prof. M Aminul Islam Department of Physics, RU

Members Prof. Irine Banu Lucy Department of Physics, RU

Mrs. Dilruba Akter Banu Department of Physics, RU



Mr. Soumitra Banerjee, TSCC, RU


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Programme Overview

18 April 2015

0930-1030 Inauguration Senate Building

1030-1045 Tea Break

Plenary Session I Ahmad Husain Gallery

1045-1145 Plenary-1

1145-1245 Plenary-2

1300-1400 Lunch Break

Parallel Session 1

1A-Ahmad Husain Gallery

1B-211 1C-311

1415-1430 EHM-Keynote-1 MS-Keynote-1 CMP-Keynote-2

1430-1445

1445-1500 EHM-Oral-1 MS-Oral-1 CMP-Oral-1







1630-1645 EHM-Oral-8 MS-Oral-8 MS-Oral-16

1645-1700 Tea Break

Parallel Session 2

2A-311 2B-Ahmad Husain Gallery

2C-211

1700-1715 EHM-Oral-9 CMP-Keynote-1 APNLO-Keynote-1

1715-1730 EHM-Oral-10

1730-1745 EHM-Oral-11 CMP-Oral-7 APNLO-Keynote-2

1745-1800 EHM-Oral-12 CMP-Oral-8

1800-1815 EHM-Oral-13 CMP-Oral-9 APNLO-Oral-1

1815-1830 EHM-Oral-14 CMP-Oral-10 APNLO-Oral-2

1830-1845 Prayer Break

Parallel Session 3


3C-211

1845-1900 EHM-Oral-14 CMP-Oral-11 NPP-Keynote

1900-1915 EHM-Oral-15 CMP-Oral-12

1915-1930 EHM-Oral-16 CMP-Oral-13 NPP-Oral-1

1930-1945 EHM-Oral-17 CMP-Oral-14 NPP-Oral-2

1945-2000 Transport to Dinner

2000-2130 Conference Dinner


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19 April 2015

Plenary Session 2

Ahmad Husain Gallery

0900-1000 Plenary-3

1000-1100 Plenary-4

1100-1115 Tea Break

Parallel Session 4


4C-311

1115-1130 EHM-Oral-18 MS-Keynote-2 NPP-Oral-3

1130-1145 EHM-Oral-19 NPP-Oral-4

1145-1200 EHM-Oral-20 MS-Oral-10 NPP-Oral-5

1200-1215 MS-Oral-11 NPP-Oral-6

1215-1230 MS-Oral-12 NPP-Oral-7

1230-1245 MS-Oral-13

1245-1300 MS-Oral-14 MS-Oral-15

1300-1400 Lunch Break

1400-1530 Poster Session

1530-1545 Tea Break and Transfer to Public Lecture

Public Lecture Session

1545-1645 Public Lecture

1645-1700 Prayer Break

1700-1720 Inauguration of Parallel Computing Cluster

1720-1820 Public Lecture

1820-1830 Closing Remarks and Farewell


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Detailed Programme with Abstracts

Plenary Session 1

18 April, Saturday 1045-1245, Ahmad Husain Gallery Chair: Professor AKM Azharul Islam, Co-Chair: Professor Bhupendra Nath Dev

Plenary-1

Non-monotonic nucleus-nucleus potential and incompressibility

of infinite cold nuclear matter

A.K. Basak1*

, M.A. Uddin1, M.S. Hossain

2 and A.S.B. Tariq

1

1Department of Physics, University of Rajshahi, Rajshahi 6205, Bangladesh

2Department of Physics, Shahjalal University of Science & Technology, Sylhet 3114, Bangladesh

[email protected]

A novel method for the determination of the yet not well-known quantity of nuclear

incompressibility, K is presented. Non-monotonic (NM) nucleus-nucleus potentials from

the energy-density functional (EDF) theory including the Pauli principle have been

considered for K in the range 188-266 MeV. The experimental cross sections of 16

O+16

O

elastic scattering over the 31-350 MeV incident energies have been analyzed in the

optical model using the NM potentials. Sensitivity of K on the elastic scattering data is studied and its value for infinite cold nuclear matter deduced to be 222 ± 5 MeV.

Plenary-2

The New Physics of Dust: New Research Horizons

A A Mamun

Department of Physics, Jahangirnagar University,Savar, Dhaka, Bangladesh

[email protected]

The new physics of dust, which arises due to dust-plasma interaction in space and laboratory

devices, is presented. How this new physics of dust has introduced different interesting research

horizons (different new field of physics involving many open issues and challenging research

problems) for young genius brains are explained. The basic features of dust-plasma interaction,

particularly basic characteristics of dust in plasmas, and typical parameters involving dust-

plasma interactions for different space and laboratory conditions are presented. The complexity

and the diversity of the field of new physics of dust are briefly discussed. As one of the many

new fields of research works on new physics of dust, theoretical and experimental discoveries of

linear and nonlinear features of waves and associated structures formed due to dust-plasma

interactions are pinpointed. It has been finally shown that because of its infinitely large domain,

versatile applications and unsolvable complexities, the physics of charged dust in a plasma


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medium has become a challenging research topic not only for near future, but also for a very

long period of time to come.

Parallel Session 1A

18 April, Saturday 1415-1645, Ahmad Husain Gallery

Chair: Professor M Aminul Islam, Co-Chair: Professor F Nazrul Islam

EHM-Keynote

Overview of NAA and its Application for Health and Environment

S.M. Hossain*, K. Naher, Sopan Das and U. Tamim

Institute of Nuclear Science & Technology, Atomic Energy Research Establishment,

G.P.O. Box No.-3787, Savar, Dhaka-1000, Bangladesh

E-mail: [email protected]

Neutron activation analysis (NAA) is a reference nuclear analytical method for quantitative

determination of elements based on the measurement of characteristic gamma radiation from

radionuclides formed by neutron irradiation of the material. The most suitable source of neutrons

is usually a nuclear research reactor. Combined with computerized high resolution digital

gamma-ray spectrometry, NAA offers mostly nondestructive, simultaneous multi-element

analysis needed in many areas for the advancement of Physics research. Due to its inherent

sensitivity and accuracy, NAA can extensively be applied to environmental sciences, nutritional

studies, health related studies, geological and geochemical sciences, material sciences,

archaeological studies, forensic studies and nuclear data measurements. In addition to these

applications, NAA has a role in the quality assurance of chemical analysis. In Bangladesh, the

NAA Group is one of the vital users of the country‟s only research reactor - the 3 MW TRIGA

Mark-II. The scope of this paper is to describe the NAA technology in brief, its application in

particular for health and environment and collaboration status with national and international

communities.

EHM-Oral-1

Assessment of contamination and nutritional deficiency in Ready-Made Baby Food

Available in Local Market using NAA and HPGe gamma spectrometry

Khadiza Begam1*

, Afia Begum1, K. Naher

2, U. Tamim

2, Sopan Das

2,Md. Maruf B

2,

Md. Alamgir Kabir3 and S. M. Hossain

2

1Dept. of Physics, BUET, Dhaka-1300

2Institute of Nuclear Science & Technology, Atomic Energy Research Establishment,

DEPZ-1349, Savar, Dhaka 3Dept. of Physics, Jahangirnagar University


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The present studies have been carried out for determination of elemental status and radiological

contamination in ready-made baby food available in the local market using the nuclear reactor

based Neutron Activation Analysis (NAA) technique and a Digital HPGe Gamma Spectrometry

system. For NAA, about 75 mg of each 15 samples were prepared in two folds followed by the

standard protocol of NAA for short and long irradiation. Two folds of each three Certified

Reference Materials (CRMs) namely, IAEA-Soil-7, IAEA-SL-1 and NIST-1633b Coal Fly Ash

were also prepared in the same way. In short irradiation scheme, individual irradiation of each 15

samples and 3 CRMs was performed in the pneumatic transfer system Rabbit Irradiation Channel

of the TRIGA reactor for 1 min with the thermal power of 250 kW for determination of Al, Ca,

Mg, Mn, Ti, V, etc. In case of long irradiation, all the samples and CRMs were irradiated

simultaneously in the same irradiation channel for 7 minute with the thermal power of 2.4 MW

for determination of Na, K, Fe, Cr, Th, U, Zn, etc. The gamma ray spectrometry was performed

for all the irradiated samples and CRMs using the Digital High Purity Gamma ray (HPGe)

spectrometry system with different decay intervals depending on the half-lives of the product

nuclides of interested elements. For quantification, the relative standardization approach was

applied. The natural gamma spectrometry was applied for determination of 238

U, 232

Th, their

daughters and 40

K in all the 15 samples. For natural gamma spectrometry, about 70g of each

sample was packed and shield in a plastic pot and kept for about 4 weeks before counting to

retain secular equilibrium between the daughters and parents of 238

U and 232

Th decay series.

Counting of each sample was performed for 20,000 sec on the surface of the HPGe detector. For

quantification, a calibration curve was constructed using Al2O3 based 226

Ra standard (800 Bq).

The measured nutritional values and radioactivity concentrations in the samples are presented in

the paper. The measured nutritional values were also compared with values quoted in the

product. The produced data will be useful for the baby to assess nutritional deficiency and toxic

effect.

EHM-Oral-2

A Study of Environmental Pollution Due Activities of Edible Oil Industries in the

Port City of Bangladesh using NAA

Maruf Bellah1*

, M.M.H.Miah1, K. Nahar

2, U. Tamim

2, Sopan Das

2 , Khadiza Begam

2

and S. M. Hossain2

1Department of Physics, University of Chittagong, Chittagong-4331

2Institiute of Nuclear Science & Technology, Atomic Energy Research Establishment,

DEPZ-1349, Savar Dhaka.

Elemental analysis has been carried out in ten edible oil waste samples collected from three

industrial areas in the Port City of Chittagong, Bangladesh. The TRIGA reactor based neutron

activation technique was employed to determine some metals and metalloids in the collected

samples. Two irradiation schemes were used: (i) For short irradiation, each sample and Certified

Reference Materials (CRMs) such as IAEA-Soil-7, IAEA-SL-1, NIST 1633b Coal Fly Ash and

Bovine-Liver-1577b were irradiated using pneumatic transfer (rabbit) system of the TRIGA

Mark-II Research Reactor with the thermal neutron flux of 1.33×1013

n/cm2/sec for 60 second.


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(ii) For long irradiation, all the samples and CRMs along with three Al-0.1%Au foils were

irradiated simultaneously with the same neutron flux of 1.33×1013

n/cm2/sec for 7 minutes. The

CRMs were used to quantify the wide number of elements as well as to control the quality of the

analysis. The gamma spectrometry of irradiated samples was performed using the HPGe detector

(CANBERRA, 25% relative efficiency, resolution of 1.85 keV at 1332 keV of Co-60) coupled

with a digital gamma spectrometer (ORTEC DSPec JrTM

) and Maestro-32 data acquisition

software. Several elements like Na, Sm, Br, Np, La, As, K, Sc, Fe, Mn, Co, Cs, Hf, Cr, Ti, Al,

Mg and V were determined and compared with the world reference values. Some elements were

found to be in elevated level. These waste or effluent may contaminate the surrounding

environment, especially the soil and the nearby. The investigation of the present work can be

treated as the baseline data and will help to assess further evaluation for contamination in future.

EHM-Oral-3

Analysis of Fish, Poultry, Feeds and Sediments using NAA for Assessment of

Elemental Status with Emphasis on Arsenic and Chromium

K.M. Shahnur Alam¹*, S.M. Hossain², K. Naher², M.A. Islam², Sopan Das2, U. Tamim²

and M.M. Akramuzzaman¹

¹.Department of Physics, Jahangirnagar University, Savar, Dhaka-1342

².Institute of Nuclear Science & Technology, Atomic Energy Research Establishment,

DEPZ-3787, Savar, Dhaka-1000


The present research focuses on analysis of fresh and sea water fishes, poultry their feeds and

sediments using the 3 MW TRIGA Mark-II Research Reactor based Neutron Activation Analysis

(NAA) technique with the aim to determine elemental status with special emphasis on arsenic

and chromium. Sixty four samples in different categories (fresh water fishes from three ponds,

and corresponding sediments, sea water fishes from Bay of Bengal, chicken from five farms,

their feeds) were analyzed through a series of NAA experiments to determine the translocations

of toxic elements from feed to fish and birds and their excretion through litters. The analytical

results revealed that some locally produced poultry and fish feeds are highly contaminated with

chromium and migrated to the corresponding bodies of chicken and fish. Arsenic contamination

was not observed in any of those samples. On the other hand, elevated level of arsenic was found

in sea fishes but not chromium. However, as far as our knowledge goes there is a clear tendency

of accumulation of some organic arsenic species in sea products like, sea weed, muscle, fish etc.

which are not harmful for us. The inorganic arsenic-III that is available in our shallow aquifer is

harmful. As the present NAA results provided the total arsenic in sea fish, it is not possible to

draw the conclusion about the arsenic toxicity of our sea fish. Another observation of the present

study is that there is clear tendency of chromium accumulation in bone compared to flesh. But

the opposite tendency was observed in case of arsenic.

EHM-Oral-4


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A study of quality of different kinds of bricks available in Bangladesh using neutron

radiography technique

A.K.M. Azad Rahman1, Sudipta Saha

3, M. Nurul Islam

2 and M.H. Ahsan

1

1Department of Physics, Shahjalal University of Science and Technology, Sylhet

2Institute of Nuclear Science and Technology,

Atomic Energy Research Establishment, Savar, Dhaka

Manufacturing building materials has become very good option of business in the developing

countries like Bangladesh. Quality control of these materials and environmental friendly

structure assurance should be confirmed on approaching such industrial establishments. Among

the non-destructive testing (NDT) techniques Neutron Radiography (NR) is the most common

procedure to study internal structure, homogeneity, any inclusion or voids or cracks etc. The

water penetration behaviour and structure can be identified more effectively through this NDT

technique. Present study has been carried out to differentiate two types of brick manufacturing

processes named Hoffman Kiln method and conventional local method. Thermal neutron

radiography facility of 3 MW TRIGA Mark-II research reactor of Atomic Energy Research

Establishment (AERE), Savar, Dhaka has been utilized in this research work. Densitometric

measurements of the neutron radiographic images of the samples have been adopted in this work.

The samples were collected from different places in Bangladesh depending on their

manufacturing process including fuel to burn, burning process etc. At first the appropriate

irradiation time was determined for the samples and then neutron radiographs were taken after

drowning the samples up to 1 inch into water for 5 min, 10 min, 15 min and 20 min

consecutively. The radiographic images under all these conditions for individual samples have

been investigated and it can be concluded with the statement that bricks made of Hoffman Kiln

method are more homogeneous inside, absorbs lower amount of water and most importantly

products of this environmentally friendly system can construct better, safer and long lasting

building structure for livelihood.

EHM-Oral-5

Investigation of Soil Contamination in Dhamrai Industrial Zone by Utilizing

Neutron Activation Analysis Technique

*R. Tarannum1, S.M. Hossain

2, K. Naher

2, M.A. Islam

2, U. Tamim

2, B.N. Sattar

1,

Z.H. Mahmood3

1Department of Nuclear Engineering, University of Dhaka, Dhaka 1000, Bangladesh

2Institute of Nuclear Science & Technology, Atomic Energy Research Establishment,

DEPZ-1349, Savar, Dhaka 3Department of Electrical and Electronic Engineering, University of Dhaka,

Dhaka 1000, Bangladesh



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The BTRR (BAEC TRIGA Research Reactor) based Neutron Activation Analysis (NAA)

technique was applied for the investigation of soil contamination due to industrial activities. For

soil analysis, an industrial zone was selected in Dhamrai nearby the Bata factory. A total of

eighteen soil samples were collected from six locations with 3 depths. The short and long

irradiation protocols of BTRR were followed for the determination of wide range of elements in

soils. The relative standardization approach was applied for quantification of elements. Three

Certified Reference Materials (CRMs)/Standard Reference Materials (SRMs) namely NIST

1633b Coal Fly Ash, IAEA Soil-7 & SL-1 were used for quantification as well as quality control

of analysis. The analytical results of soils were compared with the world references. Some of the

elements are in normal level and some elements like Ba, Ce, Co, Cr, K, Na, Sc, Th, U and V are

exceeded the world references. Higher median concentrations compared to the world values of

Th, Ba, Ce, Co, Na, K, U, V and Sc are found 17.59 ppm, 1169 ppm, 92.50 ppm, 17.36 ppm,

13165 ppm, 20383 ppm, 3.653 ppm, 130 ppm and 12.95 ppm respectively. Among all toxic

elements chromium contamination is in a critical situation. Three sample locations out of six

have been found to be highly chromium contaminated. The average concentration of chromium

is determined 416.5 ppm and its median value is found 133.4 ppm which is higher than the world

median 70 ppm of chromium concentration in soil. This is probably because any ternary industry

or leather factory uses chromium reach chemicals and the waste or effluent generated from such

a factory may contain high concentration of chromium. These waste or effluent may contaminant

the surrounding environment, especially the soil. This soil analysis data gathered in the present

work can be treated as the baseline data and will help to assess further contamination in future.

EHM-Oral-6

Measurement of Radioactivity Levels in Vegetables and Their Impact on the

Population of Peninsular Malaysia.

Khandoker Asaduzzaman1*

, Noor Liyana Mohd Nasir1, Mayeen Uddin Khandaker

1, Yusoff

Mohd Amin1, M. S. Farook

2

1Department of Physics, University of Malaya, Kuala Lumpur, 50603, Malaysia

2Department of Restorative Dentistry, University of Malaya, Kuala Lumpur, 50603, Malaysia

E-mail: [email protected].

We study radiation exposure resulting from consumption of vegetables that form an essential

part of the Malaysian diet. Malaysia, a rapid growing industrial country, is susceptible to

pollution from the presence of large scale industrial and human activities. The levels of

radioactivity appearing in the human diet are of particular concern, requiring assessment of

possible radiological risks to human health. Therefore, a comprehensive study was carried out to

determine the radioactivity levels (226

Ra, 232

Th and 40

K) and associated hazard indicators in

different varieties of vegetable collected from different regions in Peninsular Malaysia. The

estimated daily intake of each radionuclide from different varieties of vegetables ranged from 2.2

to 54.5 mBq kg–1

(total: 84.5 mBq kg–1

) for 226

Ra; 1.7 to 99.2 mBq kg–1


)

for 232

Th and 4 to 3448.8 mBq kg–1


) for 40

K. The committed doses for 226

Ra, 232

Th and 40

K due to consumption of vegetables were assessed to be 8.5, 42 and 27.3 µSv

y1

respectively, representing a total contribution to the overall radiological dose of an individual


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of 77.8 µSv y1

. This dose imposes no significant threat to human health, the estimated

probability of increase of cancer risk from daily intake of the vegetables diet representing only a

minor fraction of ICRP values.

EHM-Oral-7

A study of the natural radionuclides in soil samples from different locations of

Barendra region of Rajshahi and mining region of Dinajpur, Bangladesh

*M. Matiur Rahman1, Aleya Begum

2, Jannatul Ferdous

2 and M. A. Islam

1

1Department of physics, University of Rajshahi, Rajshahi, Bangladesh

2Health Physics Division, Atomic Energy Centre (AEC), Dhaka, Bangladesh

Email: [email protected]

The level of natural radioactivity in the soil samples collected from the Barendra region,

Rajshahi and the Mining region, Dinajpur was measured and the radiological hazard parameters

in both the regions were estimated. The activity concentrations of naturally occurring radioactive

materials in the 238

U and 232

Th decay chains and in 40

K were determined by means of a gamma-

ray spectrometry system using an HPGe detector in a low background configuration at Atomic

Energy Centre, Dhaka. The activity concentrations of 238

U, 232

Th and 40

K found in the present

study were compared with the reported values of the northern region and other districts of

Bangladesh, and those of other countries of the world. Radiological hazard parameters of the two

regions were estimated and compared with the world averages. The natural radioactivity in the

Barendra and Mining region poses no threat to general public there. Artificial radionuclide 137

Cs

was not found in the soil samples studied.

Parallel Session 1B

18 April, Saturday 1415-1645, Room 311 Chair: Professor M Shafiqul Islam, Co-Chair: Professor Khalilur Rahman Khan

MS-Keynote-1

Structure of amorphous materials: NMR as a key tool

M. G. Mortuza

Dept. of Physics, Rajshahi University, Rajshahi 6205, Bangladesh.

[email protected]

As the resonance position of Nuclear Magnetic Resonance (NMR) active nuclei depends upon

their local order, several amorphous alkaliphosphosilicate (glass) materials are chosen to show


16

the effectiveness of magic angle spinning NMR and broad line NMR. Structures of various Qm

(0 ≤ m ≤ 4) species are determined from the 29

Si resonance and that of phosphate monomer,

dimer and polymers are identified from the 31

P NMR resonance.

MS-Oral-1

A Study of Surface Morphology, Optical and Electrical Properties of Titanium

Oxide Thin Films Deposited by SPT

S. S. Roy1, A. H Bhuiyan

2, J. Podder

2, D.K Saha

3, M. A. Gafur

4

1Department of Physics, Dwarika Paul Mohila Degree College, Sreemongal-3210 2Department of Physics, Bangladesh University of Engineering and Technology,

3Bangladesh Atomic Energy Center,

4BCSIR, Dhaka, Bangladesh

E-mail:[email protected]

Nanostructure Titanium oxide (TiO2) thin films have been deposited on glass substrates at

different temperature in the range 300-500 °C by spray pyrolysis technique (SPT) from aqueous

solution using Titanium Chloride TiCl4 as a precursor while all other deposition parameters such

as spray rate, carrier gas pressure and distance between spray nozzle to substrate were kept

constant. The deposited TiO2 thin films were characterised by using X-ray diffraction (XRD),

scanning electron microscopy (SEM), optical transmission spectra by UV-visible spectroscopy

and electrical resistivity by Van-der Pauwe methd. Our experimental investigation indicated that

during film deposition has a significant influence on the optical transmittance and optical band

gap of the films. The films were single phase, homogeneous, and uniform. The band gap energy,

electrical resistivity, surface structure and figure of merit of the TiO2 thin films were found to

depend significantly on the growth temperature. The peak of X-ray diffraction patterns at 26.14°

is corresponding to (101) reflections of the anatase phase of TiO2. The crystallite size increases

with increasing substrate temperature (100–200 nm).The transmittance of the films was observed

to increase from 75 % to 92 % at 200 nm thickness on the substrate temperature increases. The

optical band gap of prepared film is found to be 3.10 eV. The absorption coefficient, optical band

gap, extinction coefficient, refractive index have been calculated. The optical band gap of the

thin films is varied from 3.0 to 3.70 eV. The electrical resistivity varies from 45 ohm‟s to 65.15

ohm.cm at different substrate temperature. Scanning electron microscopy studies revealed the

formation of sporadic growth of rod-shaped elongated particles. Both the structural and surface

properties of TiO2 thin films were improved with the increase in the deposition cycles as a result

of which the optical absorption edge of TiO2 shift towards longer wavelength. The variation of

substrate temperature affected the film morphology and optoelectronic properties. The

experimental results discussed the suitability of this material for using as transparent and

conducting window materials in solar cells.

Keywords: Thin film, TiO2, Band gap.


17

MS-Oral-2

Electrical and dielectric properties of Chromium substituted Nickel Ferrite

N. Jahan1*

, A.K.M. Zakaria2, F. -U. -Z. Chowdhury

1, Sanjida Aktar

2, S.M. Yunus

2, D.K. Saha

3,

M.N.I. Khan3

1Department of Physics, Chittagong University of Engineering and Technology, Chittagong,

Bangladesh 2Institute of Nuclear Science & Technology, Bangladesh Atomic Energy Commission, Dhaka,

Bangladesh 3Atomic Energy Centre, Bangladesh Atomic Energy Commission, Dhaka, Bangladesh


Chromium substitute Nickel ferrites NiCrxFe2-xO4 (0.0x1.0) were prepared through the solid

state reaction using conventional ceramic method and sintered at 1350C in air. Single phase

cubic spinel structure has been confirmed from the X-ray diffraction patterns for all the samples.

The temperature dependence of DC resistivity has been performed by two probe method. The

DC resistivity was found to decrease with temperature indicating the semiconducting nature of

the samples. The activation energies were calculated and found to show irregular behavior with

increasing Cr concentration in the system. The dielectric constants () as a function of frequency

have been measured in the range 1KHz-120MHz for all the compositions at room temperature.

The maximum dispersion occurs in the low frequency region which can be attributed to the space

charge polarization. While in the high frequency region it is almost same for all samples which

may arises from the electronic and ionic polarization in the system. Dielectric constant decreases

with increasing Cr content; this may be due to the fact that chromium ions have more conduction

carriers than ferrous ions in octahedral site. The dielectric loss tangent (tan) as a function of

frequency have been measured and found to be independent on frequency. As the frequency

increases, the values of dielectric losses show some irregular behavior, which may be due to the

resonance effect.

Keywords: Ferrites, Activation energy, Dielectric constant, Loss factor.

MS-Oral-3

Investigation of the structural and magnetic properties

of A0.5B0.5Fe2O4 (A = Ni, Mg; B = Zn) spinel ferrites.

M. D.Hossain1,3

*,M. A. Hakim2, S. J. Ahmed

3, M.N.I. Khan

4, A. T. M. K. Jamil

3

1Dept. of Physics, Sher-e- Bangla Nagar Adersha Mahila College, Dhaka

2Dept. of Glass and Ceramic Engineering,

Bangladesh University of Engineering and Technology, Dhaka. 3Dept. of Physics, Dhaka University of Engineering and Technology, Gazipur

4 Materials Science Division , Atomic Energy Center, Dhaka

* E-mail: [email protected]


18

In this study the theoretical and experimental investigation of structural and magnetic properties

of Ni0.5Zn0.5Fe2O4 and Mg0.5Zn0.5Fe2O4 spinel ferrites have been carried out. All the samples have

been synthesized by conventional solid state reaction method. The complex permeability

spectrum as a function of frequency of these ferrites has been studied. Magnetization, Curie

temperature, lattice parameter and complex permeability have been measured at room

temperature using VSM, XRD and impedance analyzer. Theoretical magnetic moments have

been calculated according to Neel‟s two sub-lattice model. The calculated magnetic moments in

Bohr magneton of the samples have been found to be in concomitant with the experimental

determined magnetic moments of the prepared samples. Relative magnetic loss factor and the

resonance frequency of the prepared sample have been determined from the experimental results

as a function of frequency. Theoretical lattice parameters have been observed to be quite

compatible with the experimental values. An expansion of lattice and reasonably lower Curie

temperature compared with base ferrite AFe2O4 due to non-magnetic Zn2+

substitution having

larger ionic radii have been observed resulting in decrease of the strength of JAB exchange

interaction. The application ranges of frequency of these two important ferrite materials have

been proposed from the experimental results.

MS-Oral-4

Structural Investigation of Na2O-SiO2-B2O3 Glasses and Glass-Ceramics

a M Emrul Kayesh*,

bM Rafiqul Ahsan,

bM. Golam Mortuza and

aM Humaun Kabir Rubel

aDepartment of Materials Science and Engineering, University of Rajshahi.

bDepartment of Physics, University of Rajshahi, Rajshahi-6205, Bangladesh


The Na2O-SiO2-B2O3 glasses have been characterized by both FT-IR and XRD. Infrared spectra

of Na2O-SiO2-B2O3 glasses and are examined in the region 4000 cm-1

and 400 cm-1

. The ratio of

Na2O/SiO2 is kept always constant. All the glasses are characterized by two board bands one in

the low frequency region 1600-400 cm-1

and the other in the high frequency region 4000-

1600cm-1

. All the spectra are base line corrected and deconvulated to five (5) Gaussians using

computer program. From IR spectra different significant absorption, stretching and vibrational

bands are observed as peaks in high and low frequency regions of the spectra. The assignment of

the chemical bonds is carried out by comparing its position with related glasses and crystalline

phases. The low frequency bands are assigned to Si-O-Si, O-Si-O, BO3 and BO4 and the high

frequency bands are assigned to H-O-H bond. The relative areas of the different bonds are also

plotted as a function of B2O3. This pattern indicates that with the increases of B2O3, the structural

group BO3 increases where as BO4 decreases.

The base and heat treated samples are X-ray diffracted to examine either they are amorphous or

crystalline. X-ray diffraction pattern of these base samples within the diffraction limit shows a

broad haloe which indicates that it may form glass without being crystallization. On the other


19

hand the X-ray diffraction pattern of the heat treated samples shows some phases which indicate

that these samples may show glass ceramic properties upon hear treatment.

MS-Oral-5

Electrical conductivity and initial permeability of multiferroic

xBa0.95Sr0.05TiO3-(1─x)BiFe0.9Gd0.1O3 solid solution

Mohammad J. Miah1,3*

, M. N. I. Khan2 and A. K. M. Akther Hossain

1

1Department of Physics, Bangladesh University of Engineering & Technology (BUET), Dhaka

2Bangladesh Atomic Energy Commission, Dhaka

3Department of Physics, Comilla University, Comilla


Polycrystalline xBa0.95Sr0.05TiO3-(1─x)BiFe0.9Gd0.1O3 [xBST-(1─x) BFGO] (x=0, 0.1 and 0.2)

solid solution have been prepared by solid-state reaction method. The effects of BST content on

crystalline phase, electrical conductivity, and complex initial permeability are studied. Crystal

structure of the ceramics is determined by X-ray diffraction pattern. All the compositions exhibit

perovskite structure. Structure of BFGO is stabilized through the formation of solid solution with

BST. The value of tolerance factor „t‟ varies from 0.847 to 0.864. Electric properties of the

compound are analyzed using an impedance analyzer in a wide range of frequency from 20 Hz to

120 MHz at room temperature. The Nyquist plot (Cole-Cole graph) suggests only grains have the

contribution to the resistance in this material. The AC conductivity spectrum is found to obey the

Jonscher‟s power law. Electron hopping is responsible for the AC conductivity in this

compound. The observed values of frequency exponent „n‟ are in the range 0.61<„n‟<0.83 (<1)

for all the compositions. The complex initial permeability is found to increase with the increase

in BST content.

Key words: Ceramics, Perovskite, Conductivity, Impedance, Permeability.

MS-Oral-6

Growth and characterization of Li7La3Zr2O12 single crystals for use as fast Li-ion

conductors

Md. Abdur Razzaque Sarker a,b*

, Md. Moazzem Hossainb

a Center for Crystal Science and Technology, University of Yamanashi, Japan. b Department of Physics, Rajshahi University, Rajshahi-6205, Bangladesh.


Lithium-based layered transition metal oxides have been intensively studied because of their

complex structural features and wide technological importance as positive electrode material and

electrolytes in rechargeable Li-ion batteries. Li7La3Zr2O12 is one of the most important fast Li


20

ion conductor used as potential electrolytes in solid-state batteries. Although there have a number

of studies on the powder form of this material, the nature of the bulk properties has not yet been

fully clarified. To clarify the anisotropic nature of the physical properties of the ionic conductors,

more experimental and theoretical investigations are highly desired. In this study, we firstly

synthesized the bulk single crystals of Li7La3Zr2O12 by using infrared heating floating zone

(IR-FZ) method. The grown crystals were characterized to investigate the effect of anisotropy on

transport properties that might enhance the efficiency in device applications. We showed the

beneficial usefulness of prepared ionic conductors in various applications including solid-state

Li-ion batteries.

MS-Oral-7

Effects of Inclusions on the Mechanical Properties of Structural Reinforced Bars

A. Hossain*, ASW. Kurny, F. Gulshan and U. K. Sultana

Department of Materials and Metallurgical Engineering

Bangladesh University of Engineering and Technology, Dhaka, Bangladesh


Inclusions content of pencil ingots and continuously cast billets (both ladle refined and

unrefined) produced from induction melted liquid steel have been determined. It has been seen

that billets produced from unrefined or improperly refined melts contain higher amounts of slag,

inclusion and inhomogeneity in the microstructure while refining in ladle refining furnace of

induction melted assorted scrap gives fairly clean and refined liquid steel. Metallographic study

of the reinforcing bars produced from properly refined continuously cast billets show uniform

grain size, no heterogeneity in the microstructure, little or no slag and little inclusions and better

mechanical properties.

MS-Oral-8

Synthesis of Copper Nano-colloids by Ablation Technique

1S H Kabir, 1E Hoque, 1M K Biswas, 1S M Sharif, 1,2S K Das and 1Y Haque*

1Nonlinear Optics Research Laboratory, Department of Physics, Shahjalal University of Science

and Technology, Sylhet, Bangladesh

2Sylhet International University, Sylhet, Bangladesh


Copper (Cu) nano-colloids in Double Distilled Water (DDW) have been prepared from Cu foil

by the ablation technique with a 10 ns pulsed Nd:YAG laser at the second harmonic frequency of

wavelength 514 nm. The ablation duration varied from 5 to 25 minutes with the laser operational

energy fixed at 45 mj/s.The UV-vis absorption spectra shows peaks within 600 to 700 nm due to


21

the Surface Plasmon Resonance (SPR) oscillation in Cu nanoparticles. These absorption spectra

have also been compared with the Mie absorption spectra.

Keywords: Copper Nanoparticles, Ablation Technique, UV-vis spectroscopy, Mie Scattering.

Parallel Session 1C

18 April, Saturday 1415-1645, Room 211

Chair: Professor G M Bhuiyan, Co-Chair: Professor M Mozibur Rahman

CMP-Keynote-2

Doping and disorder dependent isotope exponent in hole doped cuprates

S. H. Naqib* and R. S. Islam

Department of Physics, University of Rajshahi, Rajshahi-6205, Bangladesh


The variation of the oxygen isotope exponent (IE) with the number of doped holes, p, in the

CuO2 planes has been a source of considerable debate. The large IE over certain range of hole

concentrations always casts a shadow over any proposal where non-phononic mechanism is

invoked to describe pairing in cuprates. On the other hand, existing theoretical schemes, based

on electron-phonon interactions, cannot describe the anomalous features shown by the IE as a

function of hole concentration/disorder, either quantitatively or qualitatively. Based on an

experiment relating the possibility of Fermi-surface reconstruction to the thermoelectric transport

measurements (Nature Commun. 2:432 doi: 10.1038/ncomms1440 (2011)), we propose here a

simple scenario where isotope substitutions affect the charge/spin stripe state via the coupling to

the underlying lattice and thereby change the superconducting Tc. In this picture, significant part

of the IE, over an extended p-range, actually originates from the isotope induced stripe

modulation and is not directly related to the characteristic energy scale of the pairing phonons.

This proposal qualitatively explains all the disorder- and p-dependent features of the IE seen in

hole doped high-Tc cuprates. We also provide with an outline of some experiments that can

verify the degree of validity of the proposed scheme.

Key words: High-Tc cuprates; Isotope effect; Stripe correlations

CMP-Oral-1

Future of SMES technology and its implementation in Bangladesh: A case study

M.R. Islam

Department of Physics, University of Chittagong, Chittagong-4331, Bangladesh.



22

We have introduced the concept of SMES technology based on superconductivity for electrical

energy storage systems. In a case study, we have shown that within our limited source electrical

energy can be saved and stored. In our calculation, it can be shown that the daily load in

Chittagong University campus is about 1 hour and needs maximum energy 1.4 MWh (during

peak demand) and minimum energy 0.33 MWh (during low demand). Possible ways of getting

excess energy to manage it have been indicated. Finally, an assessment is given based on the

findings of research work carried out for the possible implementation of a SMES project in

Bangladesh.

Keywords: Electrical energy storage devices, Superconducting magnetic energy storage (SMES),

Daily load, Peak hours and Off-peak hours.

CMP-Oral-2

Evolution of in-plane resistivity with temperature and hole content in cuprate

superconductors

M. Afsana Azam1, J. R. Cole

2 and S. H. Naqib

1

1Department of Physics, University of Rajshahi, Rajshahi-6205, Bangladesh

2Cambridge Flow Solutions Ltd., Histon, Cambridge CB24 9AD, UK

The highly anisotropic nature of the in- and out-of-plane charge dynamics in high-Tc cuprates

cannot be accommodated by the conventional Boltzmann transport theory. The in-plane (a-axis)

resistivity, ρa(T, p), of pure and Ca doped Y(Ca)Ba2Cu3O7-x have been modeled in this study.

Here we have modified and extended the formalism developed by S. H. Naqib et al. where we

incorporated the role played by a quantum critical point at a critical hole concentration as well as

the doping dependent pseudogap energy scale in the quasi-particle energy spectrum to describe

the in-plane dc charge transport for double CuO2 layer Y123 compound over a wide range of

hole contents. The extracted PG energy scale, εg agrees quite well with previous studies and also

other extracted parameters shows systematic variation with hole content.

CMP5-Oral-3

A density functional theory study of ground state properties of the 211 MAX phases

V2AC (A=Al,Ga)

Mst. Rokeya Khatun1, F. Parvin

1, A.K.M.A. Islam

2

1Department of Physics, Rajshahi University, Rajshahi, Bangladesh

2Intrenational Islamic University Chittagong, 154/A College Road Chittagong 4203, Bangladesh



23

The different properties of V2AC (A = Al, Ga) have been calculated using the plane-wave

ultrasoft pseudopotential technique which is based on the first- principles Density Functional

Theory (DFT) with Generalized Gradient Approximation (GGA). This method has been applied

for the study of (i) structural properties, (ii) mechanical properties (iii) electronic band structures,

(iv) density of states (DOS), (vi) thermodynamic and (v) optical properties. We have also studied

how these properties vary with pressure.

The geometries of hexagonal V2AlC and V2GaC have been optimized as a function of pressure.

The elastic properties including the isotropic bulk modulus (B), compressibility (K), Young‟s

modulus (Y), shear modulus (G), Poisson‟s ratio () of the hexagonal V2AC binary compounds

have determined using the Voigt-Reuss-Hill (VRH) averaging scheme. The results show that the

shear modulus is the principal restraining factor for the stability of hexagonal V2AC. The band

structure and density of states show that these compounds are conductors, with contribution

predominantly from the V 3d states.

The temperature and pressure dependence of bulk modulus, Debye temperature, specific heats,

volume thermal expansion coefficient of the nanolaminates are calculated for the first time using

the quasi-harmonic Debye model.

The optical properties of V2AC, e.g. the dielectric function ε(ω), the reflectivity R(ω), the optical

absorption coefficient I(ω), the optical conductivity ζ(ω), the energy loss function L(ω) and the

refractive index n(ω) have also been evaluated and discussed.

CMP-Oral-4

Noncovalent Interaction of Organic Molecules, Drugs, Amino Acids, Dyes and

Peptide with Graphene Nanosheet (GNS): A Theoretical Study

Mohammad A. Halim1*, Md Kamal Hossain

1,2, Mohammad Mazharol Hoque

1,

Mohammad Tuhin Ali1, Sharmin Hoque

1, Mohammed Muzibur Rahman

1,

Mohammad Abdul Kader Khan1,4

, and Mohammed G Sarwar1,5

1Bangladesh Institute of Computational Chemistry and Biochemistry,

38 Green Road West, Dhaka-1205, Bangladesh 2Department of Physics, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh

3Chemistry Department & Center of Excellence for Advanced Materials Research (CEAMR),

King Abdulaziz University, Faculty of Science, P.O. Box 80203, Jeddah 21589, Saudi Arabia 4Department of Chemistry, Jubail University College, Sudair, Fanateer,

Al Jubail 35811, Saudi Arabia 5Department of Chemistry, The Scripps Research Institute, La Jolla, California 92037, USA


Graphene, one-atom-thick two-dimensional crystal, has been emerged as a super material

ensuring its promising and diverse applications ranging from optoelectronic to nanomedicine.

Numerous studies have been focused to divulge the unique electronic, optical and mechanical

properties of graphene; however, very few studies are directed to disclose the fundamental


24

understanding of graphene‟s chemical, Van der Waals, and electrostatic interactions with other

molecules.1 These interactions are very important to advance graphene‟s application for sensor,

adsorbent and drug delivery vehicle.2,3 To explore the noncovalent interactions between

molecules with graphene nanosheets (GNS), density functional theory and molecular docking

have been employed. Organic molecules (toluene, heptane, decane, and substituted

iodoperfluoroarenes), drugs (levofloxacin, donepezil, tacrine, and rivastigmine), amino acids

(glycine, glutamine, arginine, and tryptophan), organic dyes (thiazol, ethidium and SYBR) and

amyloid beta peptide (Abeta) have been interacted with armchair (10, 10) and zigzag (10, 0)

graphene of tube length 25 Å. All molecules except AB peptide were optimized by density

functional theory employing Becke‟s (B) exchange functional combining Lee, Yang, and Parr‟s

(LYP) correlation functional.4 Gaussian standard 6-31G(d) basis set was applied for non-

halogenated molecules whereas Cramer and Trular‟s MIDIX basis set was employed for

halogenated compounds. Subsequent vibrational frequency calculation has been performed to

confirm that the stationary points correspond to minima on the Potential Energy Surface.

Cartesian coordinate of Abeta peptide collected from protein data bank (PDB 2M4J). Energy

minimization of Abeta peptide was calculated by Merck Molecular Force Field (MMFF).

Molecular docking calculation was carried out by AutoDock Vina developed by The Scripps

Research Institute.5 To calculate the binding (adsorption) affinity of these molecules with

graphene sheets, the size of the grid box was set to 25 Å x 25 Å x 25 Å (x, y and z). Armchair

and zigzag graphene attained same binding energies for all molecules. The binding (adsorption)

energies of organic molecules such as toluene, heptane, decane, and substituted

iodoperfluoroarenes are -6.1, -4.9, -6.1, and -6.6 kcal/mol, respectively. Drugs have greater

binding affinity compared to the small molecules ranging from -7.7 to -13.5 kcal/mol. Binding

affinities of amino acids are varies with size and properties. Small binding energy is detected for

glycine and cysteine -1.9 and -2.4 kcal/mol whereas it is noticeably increased to -3.9, -4.3, and -

7.3 kcal/mol for glutamine, arginine, and tryptophan, respectively. Interestingly, organic dyes

such as ethidium, thiazol and SYBR have significant adsorption (-12.0 to -14.6 kcal/mol) on

graphene surface indicates that it can be used as a promising adsorbent for removing toxic dyes.

Moreover, very strong binding affinities (-18.3 and -33.2 kcal/mol) are noticed for single and

fibril Abeta peptides.

References

1. Shih C. J. et al Nature Materials 2013, 12, 866–869. DOI:10.1038/nmat3760

2. Lazar, P. et al Journal of American Chemical Society, 2013, 135, 6372−6377.

DOI:10.1021/ja403162r

3. Sun, X. et al Nano Research 2008, 1, 203-212. DOI: 10.1007/s12274-008-8021-8

4. (a) Becke, A. D. Physical Review A, 1998, 38, 3098-100. DOI: 10.1103/PhysRevA.38.3098; (b)

Lee, C. et al Physical Review B, 1998, 37, 785-89. DOI: 10.1103/PhysRevB.37.785

5. Trott, O. et al Journal of Computational Chemistry, 2010, 31, 455–461. DOI:10.1002/jcc.21334

CMP-Oral-5


25

Static and Dynamic Properties of Liquid Ni, Pd and Pt: An Orbital Free Molecular

Dynamic Study

Mohammad Riazuddin Molla1,2

, A. Z. Ziauddin Ahmed2 and G. M. Bhuiyan

2

1Department of Mathematics, University of Dhaka, Dhaka-1000

2Department of Theoretical Physics, University of Dhaka, Dhaka-1000, Bangladesh


The static and dynamic properties of liquid metals, namely Ni, Pd and Pt at thermodynamic

state T=1773K , 1853K and 2053K respectively, have been studied using the orbital free ab-

initio molecular dynamics (OF-AIMD) simulation technique. Like other ab-initio methods the

OF-AIMD uses the density functional theory along with a pseudopotential prescribed by

Bhuiyan et. al. The exchange and correlation energy is described by the local density

approximation. Static properties such as static structure factor, S(q), pair distribution function,

g(r), coordination number, isothermal compressibility,cT, are studied. The single particle and

collective dynamics such as diffusion coefficient, dynamic structure factor, velocity of sound,

shear viscosity etc. are also studied. Theoretical results are found to be good in agreement with

available experimental data and also with other theoretical results.

CMP-Oral-14

Dynamic Behavior of EPDM Studied by Microscopic Light Scattering

M. Hasnat Kabir1, Yosuke Watanabe

2, Hidemitsu Furukawa

2

1Department of Information and Communication Engineering

University of Rajshahi, Rajshahi 6205, Bangladesh 2Soft and Wet Matter Engineering Laboratory,

Department of Mechanical Systems Engineering

Graduate School of Science and Engineering, Yamagata University

4-3-16 Jonan, Yonezawa City, Yamagata, Japan, 992-8510


The internal homogeneity of cross-linked EPDM sample was studied by microscopic light

scattering. The samples were swollen with toluene for several days to insure the equilibrium

state. The scanning microscopic light scattering (SMILS), which is a laboratory dynamic light

scattering equipment (DLS), was applied to characterize the dynamic properties of the EPDM

samples. The cooperative diffusion coefficient Dcoop was determined. The correlation length of

internal three dimensional network structure was calculated which actually represents the mesh

size of polymer network. It is observed that the variations of Dcoop with cross-linked

concentration nearly obeyed the dynamic scaling law as expected. The mesh sizes obtained from

SMILS measurements were compared with those calculated from the swelling measurements. It

is found the good agreement between both data. The internal homogeneity of the samples

corresponds to the variation of cross-linked concentration is also determined and discussed here.


26

MS-Oral-16

Use of Grooving Over Ahmed Car Body for Drag Reduction

Abul Kalam Azad1 Mohammad Arif Hossain

2 A. K. M. Sadrul Islam

3

1 Rayermohal College, Khulna, Bangladesh

2 Department of Mathematics, Khulna University of Engineering & Technology, Khulna,

Bangladesh 3 Department of Mechanical and Chemical Engineering, Islamic University of Technology,

Dhaka, Bangladesh


When a body moves within a fluid it experiences drag force. If the coefficient of drag is reduced

by 0.1 then fuel consumption is reduced by 10%. Ahmed car body, employed by Ahmed and

Ramm, is a typical shape to study the vehicle shape. It has two varieties, with two slant angles.

Of them 250 slant angle shape is employed. In this study grooving, a passive strategy in which no

additional energy will be supplied, is used as a drag reduction tool. Grooving generates

additional vortices which in conjunction with the normal flow vortices is change the overall

strength and location of the wake vortices, as a result the drag changes. The simulation has been

done and studied through CFD modeling, in which it is required to choose any turbulence model.

Earlier studies suggested that out of different turbulence models k- is better suited for this

purpose. Another study suggests the choice of the size of the roughness height required for the

turbulence model. In this paper the effect of grooving at the end of the top surface, at the end of the

slant surface and combination of at the beginning and at the end of the slant surface has been

presented. It has been found that with the increase in the radius of the groove at the end of the

top surface the drag increases and supersedes the normal drag. But when grooves are placed

either at the end of the slant surface or at the beginning and end of the slant the drag has been

reduced. The results show that about 4.3006% drag coefficient has been reduced.

Keywords: Ahmed Car Body, k-ε turbulence model, Vehicle Aerodynamics, Passive control, and

Drag coefficient,

Parallel Session 2A

18 April, Saturday 1700-1830, Room 311 Chair: Dr Sadiq R Malik, Co-Chair: Professor M Rafiqul Ahsan

EHM-Oral-8

High Dose Rate (HDR) Brachytherapy Case Studies: Using Procedures and Applicators

like Cylinder, Tandem-Ovoid and Interstitial Implants

Sadiq R. Malik, Mushfika Ahmed, Parveen Akhter Banu, Ashish K Bairagi, Md. Shohel Reza,

Nilufa Yeasmin, Naheed Rukhsana, Lutfun Nahar

Radiation Oncology Division, Delta Medical College & Hospital, Dhaka, Bangladesh


27

e-mail:[email protected];[email protected]

Purpose: The word brachytherapy is derived from the ancient Greek words βρατσς, which means

„short‟ or „close,‟ and θεραπεια, which has several meanings including „medical treatment‟ or

„therapy.‟ Brachytherapy is the type of radiotherapy in which radioactive sources are placed

inside or near the tissue to be irradiated. With this form of treatment, a high dose can be locally

delivered to the tumor, with a rapid dose fall-off in the surrounding healthy tissues due to the

inverse square law. Among the therapeutic modalities available for the treatment of cervical

cancer, irradiation is regarded to be the standard treatment for all tumor stages, which includes

external beam radiation therapy (EBRT) and HDR brachytherapy or a combination of these two

modalities. In general, all women with locally advanced cervical cancer – International

Federation of Gynecology and Obstetrics (FIGO) stage IB2-IVA – should be considered for

brachytherapy as part of their definitive treatment management. Dramatic advances have been

made in brachytherapy for cervical cancer. Radiation treatment planning has evolved from two-

dimensional to three-dimensional, incorporating magnetic resonance imaging and/or computed

tomography into the treatment paradigm. This allows for better delineation and coverage of the

tumor, as well as improved avoidance of surrounding organs. Brachytherapy applications are not

restricted to one method only; any method could be combined with another, as well as other

radiotherapy techniques. In cervical cancer, intracavitary brachytherapy (ICBT) has been used

for practical reasons. Lately though, combination of ICBT and interstitial brachytherapy (ISBT)

techniques are being evaluated in deference to feasibility, practicality and reproducibility.

Advanced brachytherapy can achieve very high rates of local control with a reduction in

morbidity, compared with historic approaches. This study provides an overview of state-of-the-

art gynecologic brachytherapy, with a focus on recent advances and their implications for women

with cervical cancer.

Materials & Methods: HDR has been established in Delta Hospital in December 2010. Till then

2526 fractions have been delivered. Among them 1223 patients were treated with Cylinder, 1270

patients were treated with Tandem-Ovoid & 13 patients were treated with Interstitial Implant

Technique and 20 patients were treated with Tandem-Cylinder. Patients upto stage IIA are given

Vaginal brachytherapy after surgery. Beyond stage IIIB patients are selected for Interstitial

Implant & rest are treated with Tandem & Ovoid. Among them three patients were selected on

different staging. Three different types of applicators (Cylinder, Tandem & Ovoid and Interstitial

Implant) has been inserted according to the patient‟s anatomy and staging. Prescribed doses

were different for the implant technique.

Result: Progress from 2D- to 3D-based imaging and treatment planning for cervical cancer

brachytherapy has improved local control, reduced toxicity, and improved overall survival for

women.

Conclusion: The result of our study indicates that a precise delivery of treatment with appropriate

applicator and the choice of treatment planning technique is more important for a better outcome.

The outcome such treatments have proved better in palliative and curative cases.

Key words: HDR, cervical cancer, Intracavitary Treatment & Interstitial Implant


28

EHM-Oral-9

Evolutionary Transition of Treatment Planning from 2D RT to 3D CRT to IMRT in

Cancer Therapy

Motiur Rahman, Sadiq R. Malik and Md. Shohel Reza

Radiation Oncology Division, Delta Medical College & Hospital, Dhaka, Bangladesh

E-mail: [email protected], [email protected]

Purpose: Basic treatment capabilities with minimal imaging support have been labeled as 2D RT

(2D radiotherapy). Application of advanced imaging and dose calculation algorithm initiated

precise treatment planning enabling more sophisticated treatment delivery procedures e.g. 3D

Conformal Radiotherapy (3D CRT). Further development in these software and hardware in

treatment planning and treatment delivery capabilities made it possible for Intensity Modulated

Radiotherapy (IMRT). There are significant differences between conventional 2D RT treatment

planning and delivery and that of 3DCRT. Three-dimensional (3D) image-based treatment

planning with new delivery technologies have generated the multiple implementations of

External Beam Radiation Therapy (EBRT)techniques, in which the high-dose region is

conformed much more closely to the target volume than previously possible, hence reducing the

volume of normal tissues exposed to a high dose. Organs at Risk (OARs) are, therefore, spared.

To establish 3D CRT in an institution a number of steps are needed to establish the 3D CRT in

an institution. These may include the definition of the scope of the program, developing staffing

needs, training of all personnel engaged in the procedure, acceptance testing and commissioning

of the new equipment and establishment and implementations of a comprehensive QA program.

Intensity-modulated Radiation Therapy (IMRT) is a more advanced form of 3DCRT. The fact

that there is some dose heterogeneity for both the target and normal critical structures in the

IMRT planning procedure as compared to the traditional irradiation techniques. IMRT

techniques are significantly more complex and advanced than 3DCRT and this requires the close

collaboration and expertise of an appropriately-trained multidisciplinary team, including

radiation oncologists, medical physicists, and radiation technologists. However, this new process

of planning and treatment delivery shows significant potential for improving the therapeutic ratio

of cancer patient. IAEA-TECDOC-1588 is divided into two parts: 3D CRT and IMRT. It

provides guidelines and highlights the milestones that are to be achieved for the transition from

2D RT through 3D CRT to IMRT. The report is written as an extension to IAEA-TECDOC-1296

and should be consulted in conjunction with that report. Training is required to utilize the added

developments in Software and Hardware in the treatment planning.

Materials & Method: A 2D Planning utilizes the technologies like Simulator, Digitizer and

Treatment Planning System (TPS) and radiotherapy machine like a Linear Accelerator. Similarly

3DCRT utilizes CT scan image for reconstruction of 3D (Three Dimensional) volume, Planning

System and that for IMRT use is made of a CT scan, Planning System and MLC motions to

shape the tumor contour. MRI and PET CT Image is very useful for a 3D CRT & IMRT

(Intensity Modulation Radiotherapy) to define precisely the GTV, CTV and PTV and, of course,

the OARs (Organs at Risk) like Spinal Cord, E, Lung, Brain Tumors, Kidney, etc.

Results: Comparison of these three treatment modalities IMRT is better than 3DCRT and

3DCRT is better than 2D treatments in delivering the prescribed dose to the disease i.e. Tumor.


29

IMRT helps to conform the tumor precisely to save more OARs and dose homogeneity is better

than 3DCRT. 3DCRT treatments allows to save the OARs: Using various beam modifier

devices like as wedge, Block, Bolus, MLC, tissue compensator, etc. which is not possible for a

2D CRT treatment.

Conclusion: Treatment modalities and methods depend on the Patient‟s Staging of the cancer,

Treatment Equipment and patient‟s financial ability in Bangladesh. Delta Hospital alone treated

2348 Radiotherapy Patients where 440 3DCRT patients, 51 IMRT Patients and the rest of the

patients are with 2D CRT. Prognosis for the advanced procedure, like IMRT treatments, proved

better for the patients where it is selected as a modality of treatment.

EHM-Oral-10

Verification of dose calculation for cervical carcinoma cases treated with HDR

brachytherapy according to AAPM HEBD Report 229 and IAEA protocol.

N. Sultana1, H. A. Azhari

1, M. F. Hossain

2, G. A. Zakaria

1,3

1Dept. of Medical Physics & Biomedical Engineering,

Gono Bishwabidyalay, Savar, Dhaka, Bangladesh 2Radiation Oncology Department, United Hospital Limited, Dhaka, Bangladesh

3Dept. of Medical Physics, Gummersbach Hospital, Academic Teaching Hospital,

University of Cologne, Gummersbach, Germany


Now a days, TPS use AAPM TG-43U1 protocol for dose calculation. In this study, the HEBD

Report 229 and IAEA formalism are used to verify the TPS results manually using excel method

and has been done in the Radiation Oncology Department of United Hospital Limited (UHL)

Dhaka, using a Brachyvision 11.0.42 TPS. Five retrospective cervical carcinoma patients were

treated by EBRT (External Beam Radiotherapy) followed by BT (Brachytherapy) with

GammaMed plus brachytherapy unit using Ir-192 HDR source in Fletcher Style Applicator. In

TPS, a total dose of 7Gy is prescribed at point A (Lt, Rt) and rectum and bladder are considered

as organ at risk (OARs). ICRU 38 is used for dose calculation at point Lt A, Rt A, Lt B, Rt B and

OARs according to the Manchester system. The HEBD Report 229 and IAEA formalism

parameters (geometry function, radial dose function, anisotropy function) are determined

manually. According to HEBD Report 229 the doses at point Lt A, Rt A, Lt B, Rt B, bladder and

rectum are 6.98, 6.86, 1.79, 1.74, 2.77, 3.44Gy and IAEA dose values are 6.82, 6.70, 1.76, 1.68,

2.90, 3.66Gy respectively. The deviation between TPS calculations and manual calculations

according to HEBD Report 229 is -0.19%, 0.02%, -0.23%, 1.21%, -3.12%, -3.89% respectively.

Similarly the deviation between TPS calculations and manual calculations according to IAEA

formalism is -2.57%, -4.30%, -1.96%, -1.83%, 1.49%, 2.61% correspondingly, which are within

acceptable limit (±5%). Therefore manual calculations can be used for commissioning,

especially for a newly installed TPS (Treatment Planning System) as well as for periodical QC

checks. It is highly recommended that HEBD Report 229 is an updated protocol of AAPM TG-

43U1. In future in TPS software, this protocol can be introduced for accurate dose calculation.


30

EHM-Oral-11

Quality Control of Intensity-Modulated Radiation Therapy (IMRT)

M. Rayhan Uddin1, Kushal Chanda

1, Hasin Anupama Azhari

1, Golam Abu Zakaria

1,

M. Anwarul Islam2

1Department of Medical Physics & Biomedical Engineering,

Gono University, Savar, Dhaka-1344, Bangladesh 2Department of Oncology, Square Hospitals Ltd, Dhaka, Bangladesh


Intensity modulated radiotherapy (IMRT) is a major development in the delivery of radiation

therapy that has the potential to improve patient outcome by reducing morbidity or increasing

local tumour control. The aims of study of this paper are to ensure the MLC positional accuracy

and leaf speed, the relative dosimetric verification (Gamma index) and absolute dosimetric

verification. For MLC leaf positional accuracy & leaf speed, the Picket Fence and Synchronized

Segmented Stripes test pattern (DMLC QA test patterns and procedures) provided by Varian

Medical System have been used. For each test individual test pattern for 120 MLC have been

loaded by stand alone MLC workstation and played. For relative dosimetric verification all the

test procedures like different dose in same depth, same dose in different depth, chair test and

inhomogeneous test have been performed. All the plans have been verified by measurement and

evaluated by Gamma index. For absolute dose verification all the plans have been delivered and

measured by a 0.3 cc SemiFlex chamber along with a PTW solid water phantom. Relative and

absolute dose verifications have been followed by Quality control for Intensity-Modulated

Radiation Therapy, as in the Recommendation No.15 from SGSMP.In picket Fence and

Synchronized Segmented Stripes test, match-lines appear at -10.0, -5.0, 0.0, 5.0, 10.0 and -12.0, -

8.0, -4.0, 0.0, 4.0, 8.0, 12.0 cm respectively from the center of the field. The Gamma Index for

the different dose in same depth, same dose in different depth, chair test and inhomogeneous test

were 99.48% & -0.52%, 99.35% & -0.65%, 99.04% & -1.96% and 98.34% & -1.66% at the

pixel range in -1.00 to 1.00 & 1.00 to 2.00 respectively. Calculated and measured absolute dose

for three cases were 2.050&1.970 (% deviation 4.06), 1.728 & 1.730 (%deviation -0.011) and

1.270 & 1.250 (% deviation 1.6). IMRT is a new technology that introduces new potential for

error into the delivery of radiation therapy and the quality checks can improve the care of cancer

patients without subjecting them to unnecessary risks in our country.

EHM-Oral-12

The Gynaecological Dose Calculations at Risk Organs

using AAPM HEBD Report-229 and IAEA Protocols

1Md. Abdullah-Al-Mashud,

2Nahida Sultana,

2H.A. Azhari,

3M. Tariquzzaman

and

4G.A. Zakaria


31

1Dept. of Applied Physics, Electronics & Communication Engineering, Islamic University,

Kushtia, Bangladesh 2Dept. of Medical Physics & Biomedical Engineering, Gono Bishwabidyalay, Savar, Dhaka,

Bangladesh 3Dept. of Information and Communication Engineering, Islamic University, Kushtia, Bangladesh

4Dept. of Medical Radiation Physics, Gummersbach Hospital, Academic Teaching Hospital,

University of Cologne, Gummersbach, Germany


The purpose of the study is to calculate the dose at the risk organs i.e. bladder and rectum due to

the cervical cancer treatment and verify the TPS with calculated result. Analyzing in details the

clinical application of high dose rate brachytherapy to ensure the minimal dose at bladder and

rectum and maximum dose to cervix.

To calculate the dosimetric parameters the HEBD Report-229 (updated protocol of TG-43) and

the IAEA protocols has been used for cervical carcinoma treatment planning system. The remote

after loaded source 192

Ir (GammaMed Plus) and the Fletcher Style Applicator set has been used

and five rectospective cervical carcinoma patient has been considered. The dose at risk organs

(Bladder and Rectum) has been calculated with TPS (Brachyvision 11.0.42) according to the

Manchester system using HEBD report-229 and IAEA formalism. The Microsoft office Excel

has been used to calculate distance, radial dose constant, anisotropy function and dose. Newton‟s

interpolation method has been used for calculating anisotropy function. Matlab software has also

been used for calculation and graph representations.

According to HEBD Report-229 the maximum doses for bladder and rectum are 6.774 and 4.082

Gy respectively and minimum doses are 2.769 and 3.050 Gy correspondingly. Similarly,

according to IAEA formalism maximum dose values are 6.748 and 4.246 Gy respectively and

minimum doses are 2.899 and 2.627 Gy correspondingly. The deviations between TPS

calculations and manual calculations according to HEBD Report-229 are -2.912% and -3.784%

respectively. Similarly the deviations between TPS calculations and manual calculations

according to IAEA formalism are 1.600% and 2.727% correspondingly, which are within

acceptable limit (±5%).

EHM-Oral-13

Observation of different F-response parameters from normal median nerves

M S A Khan, Z B Mahbub, M H R Khan, M M Billah, M K Sarkar

Department of Arts & Sciences, Ahsanullah University of Science & Technology


The F-responses are motor responses results from the backfiring of anterior horn cells at spinal

cord. Its measurement can help in assessing the conduction properties of the entire length of the

nerves. Signal conduction properties of the median nerves expected to change with different


32

positions of the head by creating temporary compression/extension over the nerve roots which

are similar to neurological disorders. Purpose of this study is to observe variations of the F-

response parameters measured from median nerves for different positions of the head. F-

responses were recorded from four normal subjects by applying 30 supramaximal stimulations

using a constant current, high voltage stimulator at median nerve at the wrist with normal,

extended and compressed positions of the head. Resulting F-responses were recorded with

sampling rate 5kHz by placing the electrode over the abductor pollicis brevis (APB) muscle

using a dedicated amplifier and recorder system, Brain products. Then minimum and maximum

F-latencies, chronodispersion, amplitude and distribution of F-latencies (DFL) with 2ms bin size

were calculated. DFL were fitted to Gaussian function to find corresponding peak and width. To

observe any trend with head positions in the above parameters Page‟s L trend test were

implemented. For compressed-normal-extended positions of the heads, clear decreasing trends in

DFLpeak, DFLwidth and Fmin, adequate trends in Famp and Fmean were observed due to

temporary compressions and extensions of the nerve roots. F-response measurements and

position dependent parameters will be correlated with other electromyogram results, cervical

spondylotic patients in future.

Parallel Session 2B

18 April, Saturday 1700-1830, Ahmad Husain Gallery Chair: Professor M Obaidul Hakim, Co-Chair: Professor M Enamul Haq

CMP1-Keynote-1

Casimir Effects and Bose Condensation of an imperfect Bose gas:

d-dimensional approach

G. M. Bhuiyan

Department of Theoretical Physics, University of Dhaka


Some properties of an ideal gas of massive bosons placed in an external (meanfield) repulsive

potential and, confined between two infinite parallel slabs in a d-dimensional configuration space

are investigated systematically. Here, a single particle density of bosonic states technique is

employed to study critical temperature, Casimir effects and critical exponents, starting from the

evaluation of the grand canonical free energy in d-dimension. It is found that, the Casimir force

and the critical temperature depend on the space dimensionality. But the Casimir force decays as

an inverse power law of the distance between two slabs in the condensate and, decays

exponentially in the non-condensed state situated very close to the point of phase transition. This

study also predicts the dimensional dependence of the critical exponents of the form of 1/(d-2)

for the imperfect Bose gas. This leads to 1 for d=3.


33

CMP-Oral-6

Noncovalent Interaction of Organic Molecules, Drugs, Amino Acids, Dyes and

Peptide with Graphene Nanosheet (GNS): A Theoretical Study

Mohammad A. Halim1*, Md Kamal Hossain1,2

, Mohammad Mazharol Hoque1,

Mohammad Tuhin Ali1, Sharmin Hoque

1, Mohammed Muzibur Rahman

3,

Mohammad Abdul Kader Khan1,4

, and Mohammed G Sarwar1,5

1Bangladesh Institute of Computational Chemistry and Biochemistry, 38 Green Road West,

Dhaka-1205, Bangladesh 2Department of Physics, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh

3Chemistry Department & Center of Excellence for Advanced Materials Research (CEAMR),

King Abdulaziz University, Faculty of Science, P.O. Box 80203, Jeddah 21589, Saudi Arabia 4Department of Chemistry, Jubail University College, Sudair, Fanateer, Al Jubail 35811, Saudi

Arabia 5Department of Chemistry, The Scripps Research Institute, La Jolla, California 92037, USA


Graphene, one-atom-thick two-dimensional crystal, has been emerged as a super material

ensuring its promising and diverse applications ranging from optoelectronic to nanomedicine.

Numerous studies have been focused to divulge the unique electronic, optical and mechanical

properties of graphene; however, very few studies are directed to disclose the fundamental

understanding of graphene‟s chemical, Van der Waals, and electrostatic interactions with other

molecules.1 These interactions are very important to advance graphene‟s application for sensor,

adsorbent and drug delivery vehicle.2,3 To explore the noncovalent interactions between

molecules with graphene nanosheets (GNS), density functional theory and molecular docking

have been employed. Organic molecules (toluene, heptane, decane, and substituted

iodoperfluoroarenes), drugs (levofloxacin, donepezil, tacrine, and rivastigmine), amino acids

(glycine, glutamine, arginine, and tryptophan), organic dyes (thiazol, ethidium and SYBR) and

amyloid beta peptide (Abeta) have been interacted with armchair (10, 10) and zigzag (10, 0)

graphene of tube length 25 Å. All molecules except AB peptide were optimized by density

functional theory employing Becke‟s (B) exchange functional combining Lee, Yang, and Parr‟s

(LYP) correlation functional.4 Gaussian standard 6-31G(d) basis set was applied for

nonhalogenated molecules whereas Cramer and Trular‟s MIDIX basis set was employed for

halogenated compounds. Subsequent vibrational frequency calculation has been performed to

confirm that the stationary points correspond to minima on the Potential Energy Surface.

Cartesian coordinate of Abeta peptide collected from protein data bank (PDB 2M4J). Energy

minimization of Abeta peptide was calculated by Merck Molecular Force Field (MMFF).

Molecular docking calculation was carried out by AutoDock Vina developed by The Scripps

Research Institute.5 To calculate the binding (adsorption) affinity of these molecules with

graphene sheets, the size of the grid box was set to 25 Å x 25 Å x 25 Å (x, y and z). Armchair

and zigzag graphene attained same binding energies for all molecules. The binding (adsorption)

energies of organic molecules such as toluene, heptane, decane, and substituted

iodoperfluoroarenes are -6.1, -4.9, -6.1, and -6.6 kcal/mol, respectively. Drugs have greater

binding affinity compared to the small molecules ranging from -7.7 to -13.5 kcal/mol. Binding

affinities of amino acids are varies with size and properties. Small binding energy is detected for


34

glycine and cysteine -1.9 and -2.4 kcal/mol whereas it is noticeably increased to -3.9, -4.3, and -

7.3 kcal/mol for glutamine, arginine, and tryptophan, respectively. Interestingly, organic dyes

such as ethidium, thiazol and SYBR have significant adsorption (-12.0 to -14.6 kcal/mol) on

graphene surface indicates that it can be used as a promising adsorbent for removing toxic dyes.

Moreover, very strong binding affinities (-18.3 and -33.2 kcal/mol) are noticed for single and

fibril Abeta peptides.

(1) Shih C. J. et al Nature Materials 2013, 12, 866–869. DOI:10.1038/nmat3760

(2) Lazar, P. et al Journal of American Chemical Society, 2013, 135, 6372−6377.

DOI:10.1021/ja403162r

(3) Sun, X. et al Nano Research 2008, 1, 203-212. DOI: 10.1007/s12274-008-8021-8

(4) (a) Becke, A. D. Physical Review A, 1998, 38, 3098-100. DOI: 10.1103/PhysRevA.38.3098 (b)

Lee, C. et al Physical Review B, 1998, 37, 785-89. DOI: 10.1103/PhysRevB.37.785

(5) Trott, O. et al Journal of Computational Chemistry, 2010, 31, 455–461. DOI: 10.1002/jcc.21334

CMP-Oral-7

Structural, Elastic and Electronic Properties of Nitride Ti2CdN Phase in

Comparison with the Carbide Ti2CdC Phase from First-principles Study

M. Roknuzzaman1*

, M. A. Hadi2, M. T. Nasir

2, S. H. Naqib

2, A. K. M. A. Islam

3

1Department of Physics, Jessore University of Science and Technology,

Jessore-7408, Bangladesh 2Department of Physics, Rajshahi University, Rajshahi-6205, Bangladesh

3International Islamic University Chittagong, 154/A College road, Chittagong, Bangladesh


First-principles studies were conducted to investigate the structural, elastic and electronic

properties of the Cd-containing only synthesized MAX phase Ti2CdC in comparison with the

predicted phase Ti2CdN. Our calculations show that the substitution of C by N in Ti2CdC

mostly affects the lattice constant c; the lattice constant a almost remains unchanged. All elastic

constants and moduli increase when C is replaced by N. In comparison with the Ti2CdN phase,

Ti2CdC is more compressible along the c-axis. The elastic anisotropy in Ti2CdC is high in

comparison with Ti2CdN. Both the two nanolaminates are brittle in nature. The calculated

electronic band structures and density of states imply that the chemical bonding in two

compounds is a combination of covalent, ionic and metallic nature. Moreover, Ti2CdC is more

conducting than Ti2CdN.


35

CMP-Oral-8

Ab initio Study of Structural, Elastic, Electronic and Optical Properties of

Zirconium Metal-Based MAX Phases Zr2AC (A = Al, Si, P and S)

M. T. Nasir1*

, M. A. Hadi1*, M. Roknuzzaman

2, S. H. Naqib


4

1Department of Physics, Rajshahi University, Rajshahi-6205, Bangladesh 2Department of Physics, Jessore University of Science and Technology,

Jessore-7408, Bangladesh 3Department of Physics, Rajshahi University of Engineering and Technology,

Rajshahi-6204, Bangladesh 4International Islamic University Chittagong, 154/A College Road, Chittagong, Bangladesh


We have investigated theoretical Vickers hardness and optical properties of four zirconium

metal-based MAX phases Zr2AC (A = Al, Si, P and S) for the first time in addition to revisiting

the structural, elastic and electronic properties. First-principles calculations are employed based

on density functional theory (DFT) by means of the plane-wave pseudopotential method. The

theoretical Vickers hardness has been estimated via the calculation of Mulliken bond populations

and electronic density of states. Further, the optical properties, e.g., dielectric functions, indices

of refraction, absorption, energy loss function, reflectivity and optical conductivity of the

nanolaminates have been calculated. The results are compared with available data and their

various implications are discussed in detail. We have also shed light on the effect of different

properties of Zr2AC as the A-group atom moves from Al to S across the periodic table.

CMP-Oral-9

Sensing properties of pure, defected and light metal doped hydrogenated graphene

monolayer towards CH4

M. S. Islam1,3

* G. S. Rao1,4

, T. Hussain1,2

and Rajeev Ahuja1,2

1Condensed Matter Theory Group, Department of Physics and Astronomy, Box 516, Uppsala

University, S-75120 Uppsala, Sweden. 2Applied Materials Physics, Department of Materials and Engineering,

Royal Institute of Technology (KTH), S-100 44 Stockholm, Sweden. 3National University of Bangladesh, Gazipur-1704, DSHE, Dhaka-1000, Bangladesh.

4Dept. of Metallurgical Engineering and Material Science,

Indian Institute of Technology Bombay, Mumbai- 400076 India.

*Presenting author. Tel: (+46)0739907540; Fax: (+46) 0184715874;

E-mail: [email protected], [email protected].


36

To sense and monitor the presence of methane (CH4) molecules, an important greenhouse gas, in

small concentrations and in adverse situation and to further adsorb/desorb them reversibly has

been of great technological importance. Like many other fields, carbon based nanostructures

(monolayers) offer great promise in sensing applications due to their large surface to volume

ratio and high sensitivity. Here we have performed rigorous calculations to study the interaction

of hydrogenated graphene (CH) monolayer, a counterpart of graphene, with the CH4 molecules.

We have employed density functional theory (DFT) in spin polarized generalized gradient

approximation (GGA) to investigate the structural, electronic and gas sensing properties of pure,

defected and light metal-doped CH monolayer . We have observed that the binding energy of

CH4 to CH in its pure form falls short of the desired physisorption range and hence limits its use

at ambient conditions. To improve the binding energies we have created few defects in pure CH

by introducing hydrogen vacancies. A sharp increase in binding energies has been observed

when the CH4 molecules sit on the defect. We further studied the effect of metal doping in CH

monolayer, and to make a uniform distribution of adatoms on monolayer only light metals (Li,

Na) have been considered. To have a better description of these weakly interacting systems, we

have performed calculations with van der Waals corrections throughout this study. The bonding

mechanism has been understood by performing the Bader charge analysis.

Key words: Hydrogenated graphene, Physisorption, Binding energy.

Parallel Session 2C

18 April, Saturday 1700-1830, Room 211 Chair: Professor Yasmeen Haq, Co-Chair: Professor Abdullah Shams Bin Tariq

APNLO-Keynote-1

Electron Impact Ionization of Ions

M. A. Uddin1

,

A. K. F Haque1, M. A. R. Patoary

1 , A. K. Basak

1, and B. C. Saha

2,

1Department of Physics, University of Rajshahi, Rsjshahi-6205, Bangladesh.

2Department of Physics, Florida A & M University, Tallahassee, Florida 32307, USA.

[email protected]

Calculation of electron impact ionization cross-sections (EIICS) for H to Sc isoelectronic series

over incident energies up to 10 keV have been reviewed. This work reports the results of

calculations using our recently proposed easy-to-use models showing success in reproducing

total EIICS of ions. The selection of the range of atomic number Z for different isoelectronic

series was guided by the availability of the EIICS data either from experiments or from rigorous

quantum calculations. We have furnished the detailed description of our various models with

comparison of the outcomes of these models with experimental and other theoretical results. Our

models describe the experimental results with reasonable success for various ionic targets

belonging to the H to Sc isoelectronic series over a wide range of atomic number in each series.

Reference articles for this work:


37

1. Electron impact ionization of K-shell and H- to Be- isoelectronic series: an empirical model,

A.K.F. Haque, M.Ismail Hossain, T.I.Talukder, Mahmudul Hasan, M.Alfaz Uddin, A.K.Basak,

B.C.Saha, F.B.Malik, Radiation Physics and Chemistry, 91, 50-59 (2013).

2. Computation of electron-impact K-shell ionization cross sections of atoms. M. A. Uddin, A.

K. F. Haque, M. Masum Bliiah, A. K. Basak, K. R. Karim and B. C. Saha. Phys. Rev. A 71,

032715 (2005).

3. Electron impact ionization of beryllium isoelectronic ions, M. Alfaz Uddin, A. K. F. Haque,

M. S. Mahbub, K. R. Karim, A. K. Basak and B. C. Saha. Int. J. Mass Spectrometry, 244, 76

(2005).

4. Calculations of electron-impact single-ionization cross-sections of helium isoelectronic

systems, M. A. Uddin, M. A. K. Fazlul Haque, A. K. Basak and B. C. Saha. Phys. Rev. A 70,

032706 (2004).

5. Empirical model for the ionization cross sections of H- and He-like ions, M. Alfaz Uddin, A.

K. F. Haque, K. R. Karim, and A. K. Basak. Phys. Scr. 72, 389 (2005).

6. Electron impact ionisation in K-, L- and M-shell of atomic targets, M. A. R. Patoary, M.

Alfaz Uddin, A. K. F. Haque, M. Shahjahan, A. K. Basak, and B. C. Saha, International Journal

of Quantum Chemistry, 111, 923 (2011).

7. Generalized Kolbenstvedt model for electron impact ionization of the K-, L- and M-shell ions.

A. K. F. Haque, M. Shahjahan, M. A. Uddin, M. A. R. Patoary, A. K. Basak, B. C. Saha, and F.

B. Malik. Physica Scripta, 81, 045301 (2010).

APNLO-Keynote-2

A New Technique for Measuring the Lifetimes of Excited States of Atoms and Ions using

Time Resolved Laser-induced Breakdown spectroscopy

A.F.M. Yusuf Haider

Physics Department and the Center for Advanced Research in Sciences

University of Dhaka, Dhaka -1000, Bangladesh

[email protected]

A novel application of LIBS for the measurement of the lifetimes of excited states of

atomic/ionic species is described.

In the present LIBS set up, the second harmonic at 532 nm from a Q-switched Nd:YAG laser

was focused on the laboratory air to produce a micro-plasma. Characteristic emission spectra of

elements present in the air sample were collected by an optical fibre and analysed and detected

by a monochromator and a gated ICCD detector.

The lifetimes of the upper states corresponding to different transitions of the excited neutral

nitrogen atom (N I) were measured by using TR-LIBS. In this technique, the intensity of an

emission line corresponding to a transition is measured as a function of delay between the Q-


38

switching of the laser pulse and the opening of the window of the ICCD. The lifetimes of the

upper level 2P2 (3P) 3p

4S3/2 corresponding to the three transitions to 2P2 (

3P) 3s

4P1/2 (742.346

nm), 2P2 (3P) 3s

4P3/2 (744.27 nm) and 2P2 (

3P) 3s

4P5/2 (746.851 nm) were determined. The

average lifetimes (η) of these transitions were measured to be 201.7 ns, 104.0 ns and 65.2 ns

respectively. These values compare pretty well with the calculated values of the lifetimes of

203.8 ns, 96.7 ns and 59.2 ns for the corresponding transitions as reported by Hibbert et al.

The atomic excitation plasma temperature lifetime was found to be 1225.4 ns which also

compares pretty well with the published results.

APNLO-Oral-1

Simulation Study of Splice Losses in a Single Mode Step Index Optical Fiber

F. S. Reya* and H. R. Khan

Physics Discipline, Khulna University, Khulna-9208, Bangladesh


Optical fiber is broadly used in telecommunication purpose instead of copper wire because of its

very high bandwidth and low transmission loss. But it has many chances to loss the transmitting

signal. There is always some type of imperfection present at fiber optic connections that causes

some loss of signal. We report the result of a simulation study on the splice losses of a single

mode step index fiber. The study has been done using the software “Understanding Fiber Optics

on a PC”. For 0.2 µm transverse offset a minimum splice loss of 0.0 dB is obtained using the

wavelength of 1.3 µm, core diameter of 4.0 µm and refractive index difference of 0.14%. On the

other hand, for 0.060 tilt a minimum splice loss of 0.0 dB is obtained using the wavelength of 1.3

µm, core diameter of 4.0 µm and refractive index difference of 0.34%. This result may be

considered as an important milestone during the fabrication process of a fiber.

Key words: Optical fiber, Splice loss, Transverse offset, Tilt, Spot-size.

APNLO-Oral-2

Experimental investigation of laser induced far field diffraction pattern

due to 2, 5 – dimethylaniline

K. Chakrabarty, M. M. Tasnim, S. M. Sharafuddin, Y. Haque

Nonlinear Optics Research Laboratory, Department of Physics

Shahjalal University of Science and Technology.


The diffraction ring technique was used to study the interaction of strong optical field with an

organic nonlinear medium 2, 5 - dimethylaniline (DMA). In order to increase the transparency of


39

DMA, methanol was used as a solvent. Three different concentrations (V/V) 1:6, 1:9 and 1:15

were used in the investigation using a CW laser. The number of obtained diffraction rings

depends on the interaction of convergent and divergent beams with DMA, sample concentration

and induced laser power. The observations are found to be in good agreement with other

literature.

Parallel Session 3A

18 April, Saturday 1845-1945, Room 311 Chair: Professor AFM Yusuf Haider, Co-Chair: Professor Irene Banu Lucy

EHM-Oral-14

Effect of Radiation and Convective Energy for the Track and Intensity of Tropical

Cyclone in the Bay of Bengal

A. A. Mamun1*

, H. R. Khan1, M. Alam

2

1Physics Discipline, Khulna University, Khulna-9208, Bangladesh

2Department of Physics, Khulna University of Engineering & Technology,

Khulna-9203, Bangladesh

In the present research Advanced Research WRF (ARW) model v3.2.1 have been carried out for

the effect of radiation and convective energy on the prediction of track and intensity of Tropical

Cyclone (TC). In this research convective energies have been analyzed of tropical cyclone Sidr

and Phailin those formed over the Bay of Bengal and crossed Bangladesh and India coast during

November 2007 and October 2013 respectively. The initial and boundary conditions of tropical

cyclone are drawn from the global operational analysis and forecast products of National Center

for Environmental Prediction (NCEP-GFS) available for the public at 1°×1o resolution. The

model was run by using Kessler (KS), Lin et al. (Lin), WSM3-class simple ice, Ferrier (FE),

WSM6-class graupel and Thomson (TH) graupel microphysics (MP) schemes coupling with

different cumulus parameterization (CP) schemes and different initial conditions. The CP

schemes used to simulate the TC's are Kain-Fritsch (KF) and Betts-Miller-Janjic (BMJ). The

model domain consists of 8-24oN and 77-96

oE and has 12 km horizontal resolution with 28

vertical sigma levels. The model was run for 126 and 102-h using initial data at 0000 UTC of 11

and 12 November 2007 for TC Sidr and 120-h using initial data of 0000 UTC of 08 October

2013 for TC Phailin.Simulated convective available potential energy (CAPE), convective

inhibition (CIN), maximum convective potential energy (MCAPE), maximum convective

inhibition (MCIN) and outgoing long wave radiation (OLR) have been analyzed to observe the

impacts of these parameters on the movement of tropical cyclone.

Keywords: CAPE, CIN, OLR, Microphysics, Cumulus Parameterization

EHM-Oral-15


40

Effect of downward heat flux of the track and intensity of tropical cyclones (TC) on

the Bay of Bengal

*S. Parves

1, F. Nahid

1, M. Alam

2

1Department of Physics, Khulna University

2Department of Physics, Khulna University of Engineering & Technology


Comprehensive sensitivity analysis on physical parametrization schemes of Weather Research

and Forecasting (WRF-ARW core) model WRFV3.2.1 have been carried out for the prediction

of track and intensity of Tropical Cyclone (TC) Sidr and Phailin that formed over the Bay of

Bengal and crossed Bangladesh and India coast during November 2007 and October 2013

respectively. The initial and boundary conditions of tropical cyclone are drawn from the global

operational analysis and forecast products of National Center for Environmental Prediction

(NCEP-GFS) available for the public at 1°×1o resolution. The model was run by using Kessler

(KS), Lin et al. (Lin), WSM3-class simple ice, Ferrier (FE), WSM6-class graupel and Thomson

(TH) graupel microphysics (MP) schemes coupling with different cumulus parametarization

(CP) schemes and different initial conditions. The CP schemes used to simulate the TC are Kain-

Fritsch (KF) and Betts-Miller-Janjic (BMJ). The model domain consists of 8-24oN and 77-96

oE

and has 12 km horizontal resolution with 28 vertical sigma levels. The model was run for 126

and 102-h using initial data at 0000 UTC of 11 and 12 November 2007 for TC Sidr and 120-h

using initial data of 0000 UTC of 08 October 2013 for TC Phailin. The microphysical schemes

have a major impact on tropical cyclone track and intensity. Simulated accumulated downward

ground heat flux (ACGRDFLX), ground heat flux (GRDFLX), Downward long wave heat flux

(GLW), Downward shortwave heat flux (SWDOWN) have been analyzed to observe the impacts

of these parameters on the movement of tropical cyclone.

Key Words: Microphysics, WRF Model, ACGRDFLX, GRDFLX, GLW, SWDOWN.

EHM-Oral-16

Particulate Matter Concentrations in the Air of Dhaka and Gazipur City During

Winter: A comparative study

M. M. Hoque1*, B. A. Begum

2, A. M. Shawan

3 and S. J. Ahmed

1

1Department of Physics, Dhaka University of Engineering and Technology,

Gazipur-1707, Bangladesh. 2Chemistry Division, Atomic Energy Center. P.O. Box No. 164, Dhaka-1000, Bangladesh.

3Department of Chemistry, Jagannath University, Dhaka-1100,Bangladesh.

E-mail address: [email protected]

We have studied the particulate matter (PM2.5 and PM10) concentrations in the air of Dhaka and

Gazipur cities during December, 2013 to February, 2014 to investigate the PM status and

http://academic.research.microsoft.com/Keyword/62873/national-center-for-environmental-prediction


41

sources of air pollution in these cities. Sampling was done by Air Matrices Mini Vol. Sampler

and the quantity of PM2.5 and PM10 was detected by weighing the filters before and after

exposure. The sampling sites are Farmgate of Dhaka (CAMS-2 site), a very busy traffic point

and Joydeppur of Gazipur (CAMS-4 site), a semi-residential area. The concentrations of

particulate matter samples were determined by reflectance measurement. Basic statistic ratios of

PM2.5 and PM10 are analyzed. The concentration of PM2.5 and PM10 was not significantly

changed with respect to the previous years. Though Farmgate of Dhaka is a very busy traffic

point and Joydeppur of Gazipur is a semi-residential area, the concentration of PM2.5 and PM10 in

the air of Gazipur is found higher than that of Dhaka during the sampling period and the daily

average of PM2.5 for both the cities always exceeds the Bangladesh National Ambient Air

Quality Standard (BNAAQS, 65 µg/ m3

for PM2.5). Brick kiln emission and long range transports

increase the particulate matter in the air of Gazipur compared to that of Dhaka. More over there

is an impact of indoor air pollution on the air quality of Gazipur city.

Keywords : PM10, PM2.5, BNAAQS, CAMS-2, CAMS-4

EHM-Oral-17

Chemical-looping Technologies: An Effective Approach to Capture CO2 and H2O

Production

Md. Siam Uddin, Shah Md. Rahmot Ullah, R. K. Nondy, M. M. Islam

Dept. of EEE, University of Dhaka (Mymensingh Engineering College)


Carbon Capture and Storage (CCS) is an increasing concern now-a-days mainly as an option to

reduce CO2 emissions from electric power plants. In this paper the option to use chemical-

looping technologies to produce H2 from fossil fuels with CO2 capture have been demonstrated.

As Chemical Looping Combustion (CLC) permits solid oxygen carriers to bring oxygen from air

to fuel instead of direct contact between fuel and combustion air, CO2 and H2O are not diluted

with N2 and pure CO2 capture became easy. CLR process has been designed such a way that,

the power needed for air compression can be compensated by generated power through hot

pressurized N2 gas which results about 81.1% efficiency with 92.6% CO2 capture.

Parallel Session 3B

18 April, Saturday 1845-1945, Ahmad Husain Gallery Chair: Professor Bhupendra Nath Dev, Co-Chair: Dr M Rezaur Rahim

CMP-Oral-10

A Computational Study of the Structural, Elastic, Electronic, Optical and

Thermodynamic Properties of Binary Compound AlB2


42

Shabnaz Afrin1 and F Nazrul Islam

2

Department of Natural Sciences, Daffodil International University,Dhaka.

Department of Physics, Rajshahi University, Rajshahi.


In the present study, first-principles Density Functional Theory (DFT) with Generalized Gradient

Approximation (GGA) is exploited to investigate different properties of AlB2 by using ultra-soft

Pseudopotential technique. The study involves the calculations of the structural, mechanical,

electronic, optical and thermal properties of AlB2. All these properties are studied at ambient

condition and at various temperatures and pressures. The optimized lattice parameters, total

energy and equilibrium volume, are reported and analyzed. The bulk modulus, compressibility,

shear modulus, Young‟s modulus, Poisson‟s ratio and elastic constants for the compound have

been calculated. The band structure, total density of state and partial density of state of AlB2 at

zero and elevated pressure are also studied. It is observed that band structure of AlB2 is doubly

degenerate along Γ-A direction. The electronic band structures and density of states reveal

metallic conductivity and the major contribution of B 2p states. The optical properties of AlB2

help us to give a better understanding of the electronic structure. The absorption, reflectivity,

refractive index, dielectric function, conductivity and loss function have been studied in present.

The reflectivity spectrum shows that the material is a good reflector within the energy range,

8.15-20.65 eV for AlB2. Moreover, the thermodynamic properties of AlB2 are also studied at

different temperatures and pressures.

CMP-Oral-11

Momentum Dependent Variational Approach with Hybrid Wavefunction to

Correlated Electrons

M Atiqur Rahman Patoary1 and Yoshiro Kakehashi

2

1University of Rajshahi, Rajshahi, Bangladesh 2University of the Ryukyus, Okinawa, Japan


We propose in this presentation a local-ansatz wavefunction approach with momentum

dependent variational parameters (momentum-dependent local-ansatz, MLA) in order to describe

correlated electrons in the ground state. It is constructed by taking into account two-particle

excited states projected onto the local orbitals, and the momentum-dependent amplitudes of these

states are chosen as variational parameters. Within a single-site approximation we calculate the

ground-state energy and derive a self-consistent equation for the variational parameters by

minimizing the energy. We obtain an approximate solution, which interpolates between the weak

Coulomb interaction limit and the atomic limit. We further developed the theory to obtain the

best value of the variational parameter self-consistently. The MLA describes accurately

correlated electron states from the weak to the intermediate Coulomb interaction regime in

infinite dimensions, and works well even in the strongly correlated region by introducing a new


43

starting wavefunction called the hybrid (HB) wavefunction. The MLA-HB is therefore shown to

overcome the limitation of the original local ansatz (LA) wavefunction as well as the Gutzwiller

wavefunction.

CMP-Oral-12

A First-principles Study of a New Ternary Silicide Superconductor Li2IrSi3

M. A. Hadi1*, M. A. Alam

2, M. Roknuzzaman

3 , M. T. Nasir

1, S. H. Naqib


4

1Department of Physics, Rajshahi University, Rajshahi-6205, Bangladesh

2Department of Physics, Rajshahi University of Engineering and Technology,

Rajshahi-6204, Bangladesh 3Department of Physics, Jessore University of Science and Technology,

Jessore-7408, Bangladesh 4International Islamic University Chittagong, 154/A College Road, Chittagong, Bangladesh


The structural, elastic, and electronic properties of the very recently discovered ternary silicide

superconductor Li2IrSi3 have been calculated for the first time. We have carried out the plane-

wave pseudopotential approach in the framework of the first-principles density functional theory

implemented in the CASTEP code. The calculated structural parameters show a reasonable

agreement with the experimental results. Moreover, we have confirmed the structural stability of

Li2IrSi3 from the calculated elastic constants. The electronic band structure and density of states

indicate the strong covalent Ir-Si and Si-Si bonding which lead to form the rigid structure of

Li2IrSi3. We have discussed all the results in detail.

CMP-Oral-13

Temperature Dependence of the Zero-Field In-Plane Critical Current Density of

YBa2Cu3O7-δ High-Tc Superconductors

M. R. H. Sarkar1 and S. H. Naqib

2

1Department of Science and Humanities, Military Institute of Science and Technology, Mirpur

Cantonment, Dhaka-1216, Bangladesh 2Department of Physics, University of Rajshahi, Rajshahi-6205, Bangladesh


The nature of the temperature dependence of the zero-field critical current density, Jc0(T), in the

CuO2 planes has been investigated for c-axis oriented YBa2Cu3O7-δ (Y123) thin films over a

range of hole content, p. The hole concentration was varied by changing the oxygen deficiency,

δ, in the CuO1-δ chains by annealing the films under different oxygen partial pressures and

temperatures. The Jc0(T) values were extracted from the magnetic hysteresis (M-H) loops

obtained at different temperatures. From the analysis of the Jc0(T) data for different sample


44

compositions, we have extracted valuable information regarding the nature of the underlying

magnetic flux pinning mechanisms in Y123 superconductors. We have found that the oxygen

defects play only a secondary role in pinning of the vortices, the superfluid density, on the other

hand plays a significant role. The exponent, n, governing the Jc0(T) behavior for a given sample

composition showed a systematic behavior as hole contents are changed.

Keywords: Y123 Superconductors; Critical Current density; Flux pinning.

Parallel Session 3C

18 April, Saturday 1845-1945, Room 211 Chair: Professor Abdullah Al Mamun, Co-Chair: Professor Sharif M Sharafuddin

NPP-keynote

Constraints on quark masses from nucleosynthesis

M. Hossain Ali1, M. Jakir Hossain

2, Abdullah Shams Bin Tariq

3

1Department of Applied Mathematics, University of Rajshahi

2Department of Mathematics, University of Rajshahi

3Department of Physics, University of Rajshahi


It has been claimed from studies of nuclear stability that the values of light quark masses, if

changed with certain constraints can still produce the light nuclei and nuclear chemistry required

for the basis elements of life. It shown that nucleosynthesis provides further constraints that

almost reduce the parameter space to the physical quark masses - again strengthening the

evidence that parameters of the standard model are finely tuned.

[1] R. L. Jaffe, A. Jenkins, and I. Kimchi, Phys. Rev. D 79, 065014 (2009), arXiv:0809.1647 [hep-

ph].

[2] M. Hossain Ali, M. Jakir Hossain, Abdullah Shams Bin Tariq, Phys. Rev. D 88, 034001 (2013),

arXiv:1212.2753v2 [hep-ph].

NPP-Oral-1

Ambiguities in nucleus-nucleus optical potentials: A case study of +90

Zr elastic

scattering


45

M. N. A. Abdullah1, S. Hossain

2, Masum Billah

3, M.M.B. Azad

3, A. S. B. Tariq

3, M. A. Uddin

3,

A. K. Basak3

1 Department of Physics, Jagannath University, Dhaka, Bangladesh

2 Department of Physics, Shahjalal University of Science & Technology, Sylhet

3 Department of Physics, University of Rajshahi, Bangladesh

The non-monotonic (NM) type of optical potential, which has its root in the energy-density

functional (EDF) theory [1] that includes the Pauli principle, has been found to be a good

candidate in describing the elastic scattering of particles by different targets. [2 and the

references therein]. This paper reports on the continuous and discrete ambiguities of the -90

Zr

NM potential, observed in the analysis of the elastic scattering +90

Zr elastic scattering data at

the 40.0, 79.5, 99.5, 118.0 and 141.7 MeV incident energies. In the last 4 energy points, the

scattering data bear pronounced contributions from the refractive scattering including the

“exponential-type falloff‟ in the angular distributions at the last two energies. The study confirms

the “Goldberg criterion‟ [3] that the discrete ambiguities are gradually eliminated at sufficiently

high energies. However, even at 141.7 MeV, the discrete ambiguity could not be totally removed

using the NM potentials. Two potential families are found to describe the experimental data

existing up to about cm = 86 deg. The data beyond this scattering angle, if available, could show

preference for a particular potential family.

[1] K. A. Brueckner, S. A. Coon, J. Dabrowski, Phys. Rev. 168 (1968) 1184.

[2] S. Hossain et al., J. Phys. G 40 (2013) 105109.

[3] D. A. Goldberg, S. M. Smith, Phys. Rev. Lett. 29 (1972) 500.

NPP-Oral-2

Non-monotonic Potential Description of The Cross-section, Vector and Tensor

Analyzing Powers of The 6Li+

12C Elastic Scattering at 30 MeV

Athoy Nilima1,3*

, M. M. B. Azad1, M.M. Billah

1, A.S.B. Tariq

1, S. Hossain

2, M. A. Uddin

1,

M. Azizur Rahman3 and A. K. Basak

1

1 Department of Physics, University of Rajshahi, Rajshahi, Bangladesh

2 Department of Physics, Shahjalal University of Science & Technology, Sylhet,Bangladesh

3 Department of Physics, University of Dhaka, Dhaka,Bangladesh

This work illustrates, for the first time, the analysis of tensor analyzing powers (T20, T21, T22)

along with the differential cross-section (CS) ζ and the vector analyzing power iT11 for the 6Li+

12C elastic scattering within the framework of an optical model using microscopic shallow

non-monotonic (NM) potentials. The NM potential is generated from the energy density

functional formalism (EDF) [1] using a realistic two-nucleon interaction incorporating Pauli

Exclusion principle, especially for the bombarding energy of 30 MeV.


46

The NM nature of the Li-potential can satisfactorily describe the composite structure arising

from the nuclear refractive scattering and the Fraunhoffer diffraction in the ζ angular

distribution of the elastic scattering. The analysis also claims that the shallow NM potential can

describe the angular distributions of the analyzing powers of the elastic scattering data at 30

MeV quite satisfactorily. Since the nuclear rainbow structure arises from the scattering of lower

partial L-waves, the structure serves as a good probe of the nuclear potential in the interior

region. The ramifications of the successful description of the elastic scattering data by NM

potential to the nuclear incompressibility K of cold nuclear matter will be discussed in this talk.

[1] K. A. Brueckner, S. A. Coon, J. Dabrowski, Phys. Rev. 168 (1968) 1184

Plenary Session 2

19 April, Sunday 0900-1100

Chair: Professor Arun Kumar Basak, Co-Chair: Professor Abdullah Al Mamun

Plenary-3

Exciting 3-D MAX Phases to 2-D New Wonder Materials

A.K.M.A. Islam

International Islamic University Chittagong, Bangladesh

[email protected]

Recently synthesized 3-D MAX phases, due to their nano-laminated crystal structure, are found

to be exciting materials which combine certain best attributes of metals (good electrical and

thermal conductivity, low hardness, machinability, damage tolerance and thermal shock

resistance) with those of ceramics (high temperature strength, high elastic moduli, oxidation and

corrosion resistance). We utilized first-principles DFT method to predict optical, thermal

and other properties of several MAX phases.

In an attempt to predict the occurrence of possible new MAX phases we studied several

hypothetical phases using the finite-temperature calculation of the Gibbs energy difference

between the predicted compound and the competing phases obtained from the phase

diagram to study thermodynamic stability.

Very recently a major breakthrough in materials science is the transformation of the 3-D MAX

phases into 2-D structure called MXenes, as a kin to Grapheme, with greatly different and

unique properties that may lead to ground‐breaking advances in energy storage technology.

Further recent theoretical studies show that quasi-one-dimensional MXenes nanoribbons have

great potential for applications in nano-electronics and nano-spintronics due to their unique

quantum confinement effects.

mailto:[email protected]


47

Plenary-4

Quantum phenomena in nanostructures

B. N. Dev

Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur,

Kolkata 700032, India

[email protected]

In the past few decades, progress in crystal growth technology has made it possible to control the

dimensions of materials structures with atomic scale precision. There have been many interesting

discoveries of new phenomena in the field of lower dimensional quantum structures and

consequent developments in an effort to achieve solid state devices operating at even higher

speeds and consuming lower power, and exhibiting novel capabilities.

In 2001 National Research Council, USA, published a vision document “Physics in a new era:

An overview” to elucidate scientific priorities and opportunities and identified six areas of grand

challenges. Two among them are (1) developing quantum technologies and (2) creating new

materials. Activities in these areas have been growing around the world. Molecular beam epitaxy

(MBE) has been an important materials growth technique that has contributed enormously to

discoveries of quantum phenomena and technologies.

After presenting an overall perspective, I will give a brief description of our effort in this area of

research since the beginning of the last decade. We have been growing nanostructures by MBE,

mostly via self-organization method, and investigating the growth features and quantum

phenomena in them by various in-situ [scanning tunneling microscopy (STM) and spectroscopy

(STS), reflection high energy electron diffraction (RHEED)] and ex-situ [transmission electron

microscopy (TEM)] experimental techniques. We also investigate these systems theoretically,

mainly by density functional theory (DFT) calculations. A combined experimental and

theoretical approach will be presented.

Parallel Session 4A

19 April, Sunday 1115-1400, Room 211 Chair: Professor Somnath Bhattacharjee, Co-Chair: Professor A K Fazlul Haque

EHM-Oral-18

Radiochemical Quality Control Of99m

Tc Labeled Radiopharmaceuticals Using

Instant Thin Layer Chromatography

S Mistry1*

, H. R. Khan1, A. K Paul

2


2Institute of Nuclear Medicine & Allied Sciences(INMAS),Khulna-9000, Bangladesh


48

The radiochemical purity (RCP) assessment of 99m

Tc labeled radiopharmaceuticals is valuable

for quality control before performing any diagnostic procedure. In the present study RCP

measurement has been done by radio chromatographic technique using instant thin layer

chromatography(ITLC). Three routinely usedof 99m

Tc-labeled radiopharmaceuticals namely 99m

Tc-DTPA, 99m

TC-MDP, 99m

TC-DMSA have been examined to determine their respective

RCP in INMAS, Khulna. ITLC plate (10cm×1.5cm) is used as a stationary phase for measuring

the radiochemical impurities-free pertechnetate, reduced hydrolyzed.We use one of the mobile

phase ethyl methyl ketone (CH3-CO-C2H5) to measure the amount of free pertechnetate

(99m

TCO4-) in the labeled radiopharmaceuticals. Another mobile phase 0.9% saline is used to

determine the reduced hydrolyzed(99m

TcO2-).The amount of radioactivity has been measured by

the mini assay gamma well counter. The values of the radiochemical purity for the 99m

Tc-DTPA, 99m

Tc-MDP, 99m

Tc-DMSA are 99.46, 98.2%, and 97.1%, respectively. The measured amount of

the RCP of the selected radiopharmaceuticals is within the acceptable limit i.e., ≥94% for the

administration of the patients and performing diagnostic nuclear medicine procedure.

Key Words: Radiochemical purity (RCP), Radiopharmaceuticals, Instant thin layer

chromatography (ITLC), Mobile phase.

EHM-Oral-19

Quality Control of Gamma Camera with SPECT Systems

R. Hasan1*

, H. R. Khan1, A. K. Paul

2


2Institute of Nuclear Medicine & Allied Sciences, Khulna-9000, Bangladesh

Quality control of Gamma Camera with SPECT System is highly valuable for assurance

performance characteristic. In the present study we report the performance characteristic of

gamma camera by intrinsic calibration and verification measurement. The study has been done

using the data from Siemens Symbia S Series gamma camera by using a point source 99m

Tc at the

Institute of Nuclear Medicine & Allied Sciences (INMAS), Khulna. From intrinsic calibration

and verification flood series, the integral uniformity for the central field of view (CFOV) has

been found in between 4.01% and 2.88% and for the useful field of view (UFOV) has been in

between 4.77% and 4.30%. The differential uniformity for the CFOV has been in between 1.53%

and 2.04% and for the UFOV has been in between 2.32% and 2.77%.According to Operating

Instruction Symbia System S Series manual, uniformity can compensate for values exceeding

10%, however while integral uniformity exceed 7%, have to contract Siemens customer service

representative. From the study result it may be concluded that the assumption of working

function of Gamma Camera is performed well.

Keywords: Gamma Camera, SPECT, Quality Control, Intrinsic Uniformity.


49

EHM-Oral-20

Using X-ray Fluorescence Technique Detection of Chromium (Cr) and investigation

of Cr propagation from Poultry Feeds to Egg and Chicken Flesh

Arifuzzaman Raji, Md. Tariqur Rahman, Abu Bakar Md. Ismail

Dept. of Applied Physics & Electronic Engineering,

University of Rajshahi, Rajshahi 6205, Bangladesh

e-mail: [email protected]

This paper presents possibility of detecting the presence and propagation of heavy-metals,

particularly Chromium (Cr), in poultry at Rajshahi area using X-ray fluorescence (XRF)

technique. Investigation was done to assess the possible transfer of heavy metals from poultry

feeds to chicken meat. Conventionally, heavy metals, particularly Cr is quantified by atomic

absorption spectroscopy (AAS), Inductively-coupled plasma spectroscopy (ICPS) etc., which are

costly, time consuming and require sample preparation. In contrast, XRF is fast, low-cost and

require no sample preparation. Poultry feeds and eggs were collected from different vendors at

Rajshahi. It was found that some of the locally produced poultry feeds contained a considerable

amount of Cr that propagates to the chicken meat and egg. This Cr might be hazardous for

human health. Among the four most widely used feeds in Rajshahi region maximum Cr

concentration of 17.3 ppm was detected in “Adorsho feed (Pabna)”. Transmission of Cr from

feed to egg and various parts of chicken were investigated with chicken samples of different ages

grown by feeding “Adorsho feed”.

An average of 4.3 ppm of Cr was found in yolk and 2.7 ppm was found in the egg-white. Highest

concentration of Cr was found to be 5.9 ppm in the brain of 29-day old chicken. The

concentration of Cr was different in various parts of chicken depending on its age. The

experimental results indicate that the XRF technique can be used efficiently to detect the

presence and transmission of heavy metals like Cr from feed to egg and poultry.

Parallel Session 4B

19 April, Sunday 1115-1400, Ahmad Husain Gallery Chair: Professor M Golam Mortuza, Co-Chair: Professor Saleh Hasan Naqib

MS-Keynote-2

Pyrolized ZnO and CdO thin films and their characterization

M.K.R.Khan and M.M.Rahman

Department of Physics, University of Rajshahi, Rajshahi-6205, Bangladesh



50

Thin films of ZnO & CdO and their doped progenies have been synthesized by a simple and cost

effective spray pyrolized (SP) method. Synthesized films were undertaken for structural (XRD,

SEM, EDX, AFM), optical and electrical characterizations. A variety of nano-structural and

doping dependent microstructural changes were observed of the crystalline films. Band gap

tuning by doping different elements are observed for pyrolised ZnO and CdO films. Band to

band and a multiple emissions of photoluminescence in ultraviolet and green regions emerged

from different defect states present in the films.

Grown CdO films are highly conducting and transparent with small reflectivity (2–6%) in the

visible spectral range, may be suitable for window layer applications. The conductivity of un-

doped CdO film shows metallic behavior at lower temperature region. This behavior dies out

completely with doping of Al and exhibits semiconducting behavior for whole

measured temperature range. Surface morphology of CdO film was improved substantially by

Al-doping.

The conductivity of ZnO pyrolised films are increased with increasing Al doping up to 3%after

which conductivity decreased due to the formation of Al-oxides. ZnO turns out to be p-type by

doping with Ag-N co-doping and by > 7% N doping only. This behavior has been explained by

am-bipolar transport phenomenon.

MS-Oral-9

Effect of N and Al-N dual doping on optical, photoluminescence and transport

properties of pyrolised ZnO films

M. N. H. Liton1, M. K. R. Khan

2 and M. M. Rahman

2

Department of Physics, Begum Rokeya University, Rangpur-6400

Department of Physics, University of Rajshahi, Rajshahi-6205


N-doped and Al-N dual-doped ZnO thin films have been synthesized on glass substrate by low

cost spray pyrolysis technique. Introduction of N and Al in ZnO subsequently affects the surface

morphology and electro-optical properties of ZnO. SEM micrographs clearly show the formation

of nano-scale semi-spherical and hexagonal crystalline grains. 3D AFM images revealed the

formation of crystalline grains with array structure. Transparency of the films increased

substantially for N and Al-N dual-doping in ZnO lattice in the measured optical spectrum range

(380 nm to 1000 nm). Optical band gap calculations reveal that un-doped, N-doped and Al-N

dual-doped ZnO thin films are direct band gap semiconductor. The carrier concentration of un-

doped and Al-N dual-doped ZnO samples is found to be the order of ~1015 cm-3. Highly N (>

6%) doped ZnO samples shows p-type behavior. Photoluminescence study confirms both near

band edge (NBE) and the deep level (DLE) emissions.

MS-Oral-10


51

Optical and Photo-electrical study of ZnO-CdO nano-crystalline Films

A.M.M. Tanveer Karim*, M.K.R. Khan and M.M. Rahman

Department of Physics, University of Rajshahi, Rajshahi-6205


Compositional dependence of the optical and photo electrical properties of spray derived ZnO-

CdO composite films with volume ratio of Zn:Cd = 1:0, 3:1, 1:1, 1:3 and 0:1 have been studied.

X-ray diffraction (XRD) results suggest that the samples are polycrystalline and their

crystallinity increased with increasing Zn/Cd ratio. The average grain size is in the range of 13-

28 nm. From optical studies, it is found that the transmittance and the band gap decreased as Cd

concentration increased. Photoluminescence studies on ZnO-CdO films show intense near-band

edge emissions at room temperature. The volume energy loss (VELF) increases more than the

surface energy loss (SELF) at their particular peaks. The third-order nonlinear polarizability

parameter is higher for ZnO-CdO thin films with higher concentration of cadmium. The Photo

current-voltage characteristics of the films are found to be strongly dependent on the deposition

solvent. This experiment leads enhanced photosensitivity of the films to artificial visible spectra.

MS-Oral-11

Investigation of the structural and magnetic properties of A0.5B0.5Fe2O4

(A = Ni, Mg; B = Zn) spinel ferrites

M. D.Hossain1,3

, and M. A. Hakim2, S. J. Ahmed

3, M. N. I. Khan

4, A. T. M. K. Jamil

3

1Dept. of Physics, Sher-e- Bangla Nagar Adersha Mahila College, Dhaka

2Dept. of Glass and Ceramic Engineering,

Bangladesh University of Engineering and Technology, Dhaka. 3Dept. of Physics, Dhaka University of Engineering and Technology, Gazipur

4Materials Science Division , Atomic Energy Center, Dhaka


In this study the theoretical and experimental investigation of structural and magnetic properties

of Ni0.5Zn0.5Fe2O4 and Mg0.5Zn0.5Fe2O4 spinel ferrites. All the samples have been

synthesized by conventional solid state reaction method. The complex permeability spectrum as

a function of frequency of these ferrites has been studied. Magnetization, Curie temperature,

lattice parameter and complex permeability have been measured at room temperature using

VSM, XRD and impedance analyzer. Theoretical magnetic moments have been calculated

according to Neel‟s two side sub-lattice model. The calculated magnetic moments in Bohr

magneton of the samples have been found to be in concomitant with the experimental determined

magnetic moments of the prepared samples. Relative magnetic loss factor and the resonance

frequency of the prepared sample have been determined from the experimental results as a

function of frequency. Theoretical lattice parameters have been observed to be quite compatible

with the experimental values. An expansion of lattice and reasonably lower Curie temperature


52

compared with base ferrite AFe2O4 due to non-magnetic Zn2+ substitution has been observed

resulting in decrease of the strength of JAB exchange interaction. The application ranges of

frequency of these two important ferrite materials have been proposed from the experimental

results.

MS-Oral-12

A circular microstrip patches antenna to operate in dual band for wireless

communications

S. Dobir Hossain1 and K M Abdus Sobahan

2

1Department of Physics, Jessore University of Science & Technology, Jessore-7408, Bangladesh.

2Department of Applied Physics Electronics & Communication Engineering,

Islamic University, Kushtia-7003.


Due to technology oriented requirements of high speed wireless local area networks (IEEE

802.11a standard) here a single and dual band rectangular micro-strip patch antenna has been

designed. The proposed antenna is excited by using the coaxial line feed and single layer

dielectric substrate are used for obtaining the high bandwidth and also for getting high gain of

the antenna. An E shaped slot has been introduced in the radiating patch to get the maximum

current distribution on the surface. The effects of radius of the patch on the performance of the

designed antenna have been analyzed to get the optimized performance of the presented antenna.

During simulation we have also consider the cost estimation with size reduction and enhanced

gain of the structure. To meet this challenge the frequency-dependent Smith-Chart model is

adopted in this research that is a frequency-dependent characteristic of the material. Finally the

simulated results which cover 2.63 to 2.86GHz and 5.84 to 6.12GHz band are good in agreement

with measured results making antenna to be used for WLAN applications.

MS-Oral-13

Enhanced catalytic activity of femotosecond laser irradiated inhomogeneous solid-

solution alloy nanoparticles

Md. Samiul Islam Sarker*, Takahiro Nakamura† and Shunichi Sato†

*Department of Physics, University of Rajshahi, Rajshahi-6205, Bangladesh

†Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University,

Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan


Catalytic Rh-based alloy nanoparticles with high stability and enhanced activity having

inhomogeneous solid-solution structure were successfully prepared from homogeneous solid-

solution alloy nanoparticles by heat treatment. First, homogeneous solid-solution alloy


53

nanoparticles of Rh and other noble metals which have immiscibility were formed by laser

irradiation of a metallic ion solution. From the elemental mapping by STEM and the composition

analysis by EDS, it was clearly demonstrated that the all elements are uniformly dispersed in

each particle and the alloy composition was almost the same as the initial feeding ratio of

metallic ions in a solution strongly indicating all-proportional solid-solution alloy formation over

the whole composition range. Although the catalytic stability of the Rh-based all-proportional

solid-solution alloy nanoparticles through CO oxidation reaction was much improved, the

catalytic activity was not changed in comparison with that of pure metals due to the uniform

local structure in atomic level. However, the catalytic activity of alloy nanoparticles was

enhanced by heat-treatment which was presumably attributed to the spillover reaction at the

dissimilar interface of the inhomogeneous solid-solution alloy nanoparticles.

MS-Oral-14

Fabrication of n-ZnO/p-Si(100) and n-ZnO:Al/p-Si(100) heterostructures and study

of I-V, C-V and RTPL characteristics

M. A. Hadi Shah1, M. K. R. Khan

2 and M. M. Rahman

2

Department of Physics, Rajshahi University of Engineering and Technology, Rajshahi-6204

Department of Physics, Rajshahi University, Rajshahi-6205


Heterojunction diodes of n-ZnO/p-Si(100) and n-ZnO:Al/p-Si(100) were fabricated by spray

pyrolysis technique. The I–V characteristics of the heterojunctions confirmed the rectifying

diode behavior at different temperatures and different illumination intensities. For low forward

bias voltage, typical values of the ideality factors were determined to be 1.23 for undoped and

1.14 for 3% Al doped heterostructures at room temperature (RT), indicating the good diode

characteristics.

The capacitance-voltage (C-V) response of n-ZnO/p-Si (100) and n-ZnO:Al/p-Si (100)

heterojunctions were studied for different oscillation frequencies. From 1/C2-V plot, the

junction built-in voltage, Vbi was found to be 0.3 V for undoped and that for 3% Al doped

junctions was 0.4 V at RT, respectively. The differences in built-in potential for different

heterojunctions indicate the different interface state density of the junctions.

The RT photoluminescence (PL) spectrum of n-ZnO/p-Si (100) heterostructure showed an

intense main peak at near band edge (NBE) 378 nm (3.28 eV), and weak deep-level emissions

(DLE) centered at 436 nm (2.84 eV) and 412 nm (3.00 eV). The NBE emission is attributed to

the radiative recombination of the free and bound excitons and the DLE results from the

radiative recombination through the deep level defects.

MS-Oral-15


54

Sintering Temperature Dependence of Structural and Magnetic Properties of

Ni0.6Zn0.4Fe2O4 Ferrite

M. A. Ali1, M. N. I. Khan

2, D. K. Saha

2, S. M. Hoque

2, S. I. Liba

2, S. Akhter

2, A. Pervin

2, A.

Begum2

and M. M. Uddin1

1Department of Physics, Chittagong University of Engineering and Technology (CUET),

Chittagong-4349, Bangladesh. 2Materials Science Division, Atomic Energy Center, Dhaka-1000, Bangladesh.


The effect of sintering temperatures (Ts) on the structural and magnetic properties of

Ni0.6Zn0.4Fe2O4 ferrites synthesized by conventional double sintering method has been reported.

The sample is sintered at Ts = 1200 °C, 1250 °C, 1300 °C, 1350 °C, and 1400 °C. The X-ray

diffraction (XRD) analysis reveals the formation of a single phase cubic spinel structure of the

sample. The structural parameters of the sample such as lattice constants, bulk density, X-ray

density and porosity as a function of Ts have been calculated. The magnetic parameters such as

saturation magnetization, Ms; coercive field, Hc; remnant magnetization, Mr; maximum

permeability μmax; and Bohr magnetron, μB are determined from the magnetic field dependent

hysteresis loop. Curie temperature (Tc) has also been determined from the temperature dependent

permeability measurement. The obtained values are found to be 71.94 emu/gm and 1.2 Oe for Ms

and Hc, respectively at Ts=1300 C. Particular noteworthy is that the sample with a very low Hc

might be a promising candidate for transformer core and inductor applications.

Keywords: Ni0.6Zn0.4Fe2O4 ferrite, soft ferrite, XRD, saturation magnetization, Curie

temperature.

Parallel Session 4C

19 April, Sunday 1115-1400, Room 311 Chair: Dr Syed M Hussain, Co-Chair: Professor M Alfaz Uddin

NPP-Oral-3

Determination of Neutron Capture Cross Section of 164

Dy (n,)165

Dy Reaction at

Thermal Energies using TRIGA Reactor

*B.N. Sattar1, S.M. Hossain

2, K. Naher

2, M.A. Islam

2, U. Tamim

2, R. Tarannum

1,

Z.H. Mahmood3

1Department of Nuclear Engineering, University of Dhaka

2Institute of Nuclear Science and Technology, AERE, DEPZ-1349, Savar, Dhaka

3Department of Applied Physics, Electronic & Communication Engineering, University of Dhaka



55

In this experiment, the cross section for (n,) reaction induced on dysprosium (Dy) at the neutron

energies of 0.0334 eV and 0.0536 eV were measured relative to the flux monitor reaction 197

Au(n,)198

Au. Two Dy foils each of which is sandwiched by two pure gold foils were

irradiated for 2 hours at 2.4 MW of reactor power. One of the samples was irradiated by the

unidirectional monoenergetic beams in SAND (Savar Neutron Powder Diffractometer) coming

through the Radial Beam Port-II of BTRR (BAEC TRIGA Research Reactor). Simultaneously,

the TAS (Triple Axis Spectrometer) installed at radial piercing beam port was utilized to

irradiate another Dy sample. From the Irradiation facilities of SAND and TAS neutron beams of

0.0334 eV and 0.0536 eV are obtained, respectively. The activities of irradiated targets and

monitors were measured nondestructively using the HPGe detector coupled with the digital

gamma spectrometer. The full energy photo peak detection efficiency curve of the detector was

constructed using standard gamma ray emitting sources. This curve was used to acquire

efficiencies of the detector at different required energies. Using the well known neutron

activation formula, the neutron capture cross-sections of 164

Dy(n,)165

Dy reaction were obtained

2322±140 barn and 323±24 barn at 0.0334 eV and 0.0536 eV, respectively. The cross section at

0.0334 eV is only 4.3%, 4.5% and 3.15% higher than the evaluated values extracted from the

ENDF/B-VII.1, ROSFOND and JENDL-4.0, respectively. However, the measured value at

0.0536 eV is almost 81% below the evaluated values collected from the above mentioned data

libraries. Further investigation is required to find out the cause of the discrepancy.

NPP-Oral-4


Mn(n,γ)56

Mn Reaction at

0.0334 eV Using TRIGA Mark-II Research Reactor

*Rafi Ibna Asad1, M. Aminul Islam

1, K. Naher

2, U. Tamim

2 and S.M. Hossain

2

1Department of Physics, RajshahiUniversity

2Institute of Nuclear Science and Technology, AERE, DEPZ-1349, Savar, Dhaka


The thermal neutron absorption cross section for the 55

Mn(n,γ)56

Mn reaction was measured at

0.0334 eV neutron energy relative to the flux monitor reaction 197

Au(n,)198

Au using the

TRIGA MARK-II research reactor, Atomic Energy Research Establishment, Savar,

Dhaka, Bangladesh. The pure MnO2 target sandwiched with two pure gold foils were

irradiated by the unidirectional mono-energetic neutron beam in SAND (Savar Neutron Powder

Diffractometer) coming through the Radial Beam Port-II of BAEC TRIGA reactor. The monitor

reaction induced in a high purity gold foil is used to determine the effective neutron beam

intensity. The activity induced in the sample and monitor foils were measured

nondestructively by a high resolution HPGe detector (Canberra, 25% relative efficiency,

1.85 keV resolution at 1332 keV of 60

Co) coupled with the digital gamma spectrometer

DSpecJrTm

(ORTEC) and Maestro-32 acquisition software. Corrections for gamma

attenuation, neutron self absorption, peak detection efficiency, etc. were implemented for

cross section calculation. The cross section at this energy was found to be 10.66±0.95 barn

which was 7.82% lower than the recently reported evaluated values of both ENDF/B-VII


56

and JENDL-4 and 8.76% lower than that of ROSFOND-2010. The deviations in both cases

were within estimated uncertainty quoted with the present experimental value. An

extensive survey ofliterature reveals thatthe present experimental cross section value for 55

Mn(n,γ)56

Mn reaction at 0.0334 eV is determined for the first time.

NPP-Oral-5

Radiochemical measurement for production and separation of Copper

radionuclides at a TRIGA Mark-II research reactor

M.R. Zaman*2

, S.M. Hossain1 M.S. Uddin

1 and S.M Qaim

3

1Institute of Nuclear Science and Technology, Atomic Energy Research Establishment, Savar,

G.P.O Box No. 3787, Dhaka-1000, Bangladesh 2Department of Applied Chemistry and Chemical Engineering, University of Dhaka, Dhaka-

1000, Bangladesh 3Institut für Neurowissenschaften und Medizin, INM-5: Nuklearchemie, Forschungszentrum

Jülich, 52425 Jülich, Germany

E-mail: : [email protected]

Integral cross sections of the 64

Zn(n, p)64

Cu and 67

Zn(n, p)67

Cu reactions were measured for the

fast neutron spectrum of TRIGA Mark-II reactor at Savar, Dhaka, Bangladesh. A clean

radiochemical separation was performed to isolate the copper radionuclides from the target

element zinc. The radioactivities produced in the irradiation were measured by HPGeγ-ray

spectroscopy. The neutron flux over the energy range 0.5–20 MeV was determined using

the 58

Ni(n, p)58

Co monitor reaction. The measured results amount to 28.9 ± 2.0 mb and

0.84 ± 0.07 mb for the formation of 64

Cu and 67

Cu, respectively. These values are slightly lower

than the respective values for a pure fission spectrum. The present results were compared with

data calculated using the neutron spectral distribution and the recently critically analysed

excitation function of each reaction given in the literature. The good agreement validates the

reliability of those excitation functions.

NPP-Oral-6


La(n,)140

La Reaction at

0.0334 eV using TRIGA Mark-II Research Reactor

U. Tamim1, S.M. Hossain1, K. Naher1, M.S. Uddin1, M.A. Islam1, S. Das1, F. Akter2,

S.M.A. Islam2

1Institute of Nuclear Science & Technology, Atomic Energy Research Establishment, G.P.O. Box

No.3787, Dhaka-1000, Bangladesh

2 Department of Physics, Jahangirnagar University, Savar, Dhaka



57

The cross section for the (n,γ) reaction induced on lanthanum at the energy of 0.0334 eV have

been measured using neutron activation analysis technique. The neutron beam intensity was

measured using the 197Au(n,γ)198Au reaction. The neutron capture cross section for

139La(n,γ)140La reaction at the thermal energy of 0.0334 eV was obtained 7.9±0.4 b. The result

of this work is compared with the ENDF/B-VII (2007) and JENDL-3.3(2002) evaluated nuclear

data libraries. The measured cross section values matched with the ENDF/B-VII and 3.8%

higher than JENDL-3.3. As far as our knowledge goes, this is the first experimental values for

this reaction at this energy. A number of authors have also been reported thermal neutron capture

cross section for the 139La(n,γ)140La reaction at average thermal average energy at 0.0253 eV.

At this energy the cross section varies from 8.1 to 9.6 b. In those references the Cd cut off energy

technique is used. The technique is cumbersome, possibility of inclusion large uncertainty and

also risk for handling due to the production of high radioactivity. On the other hand, our

technique of using reflected unidirectional mono-energetic neutron beam from TRIGA Mark-II

research reactor is simple and straight forward approach and possibility of inclusion less

uncertainty. The present experimental cross section value will help for further improvement of

evaluated nuclear data libraries.

NPP-Oral-7

Characterization of Tangential Beam Port of TRIGA Reactor for Neutron Capture

Cross Section Determination at Average Thermal Energy

M.M. Haque1, *S.M. Hossain

2, M.S. Uddin

2 and S.M.A. Islam

3

1Bangladesh Atomic Energy Commission, Paramanu Bhaban, E-12/A, Agargaon,

Sher-e-Banglanagar, Dhaka-1207; 2Institute of Nuclear Science & Technology, Atomic Energy Research Establishment,

G.P.O. Box No.-3787, Savar, Dhaka-1000, Bangladesh; 3Department of Physics, Janhangirnagar University, Savar, Dhaka.

Optimum utilization of the reactor is essential for many reasons e.g., to save the costly fuel, to

reduce the electricity consumption, etc. So that it is essential to find out the opportunity to use all

the irradiation channels simultaneously for various experimental purposes at the time of reactor

operation. There are several irradiation channels within the reactor core and its surroundings

namely, DCT (Dry Central Thimble), Rabbit Irradiation Channel (Pneumatic Transfer based) and

a number of irradiation holes of Rotary Specimen Rack or Lazy Susan are being utilized for

various experimental purposes. Besides the reactor core several beam ports are available for

various research purposes. At present the Tangential beam port (TBP) is utilizing only for

neutron radiography. Our aim is to utilize this TBP channel for neutron capture cross section of

various targets at the average thermal energy of 0.0253 eV. With this view, it is important to

measure neutron field parameters in TBP irradiation channel include the variation of thermal and

epithermal neutron flux with distance from the inner end to the outer end of the collimator,

spectral index, -value and f-value. In the present work the above mentioned parameters were

determined using different approaches. The measured parameters were validated by measuring

the neutron capture cross section of a well known reaction and comparing the measured values

with existing evaluated nuclear data libraries.


58

Poster Session

19 April, Sunday 1400-1530, Room 112

APNLO-Poster-1

Simulation Study of Bending and Micro bending Losses of a Single Mode Step Index

Fiber

P. Roy*and H. R. Khan

Physics Discipline, Khulna University, Khulna-9208, Bangladesh


Now-a-day‟s optical fiber is widely used for the communication purpose. But there are some

reasons for the loss of signal from the optical fiber during signal transmission. Bending and

micro bending losses are the important reasons to loss signal. We perform a simulation study of

the bending and micro bending losses of the single mode step index fiber. The study has been

done using the software “Understanding Fiber Optics on a PC”. We find a minimum loss of 0.0

dB for the operating wavelength of 1.3 µm, core radius of 4.0 m , relative index difference of

0.35% and bending radius of 7 cm. This result may be an important consideration to design an

optical fiber.

Key words: Optical Fiber, Transmission loss, Bending loss, Micro bending loss, Spot-size.

APNLO-Poster-2

Non linear Optical Properties of Dimethylaniline (DMA) using Thermal lens

Technique

M. K. Biswas1, P. Das

1, E Hoque

1, S. M. Sharif

1, S. K. Das

1,2, Y. Haque

1

1Nonlinear Optics Research Laboratory, Department of Physics,

Shahjalal University of Science and Technology, Sylhet, Bangladesh 2Sylhet International University, Sylhet


Studying the nonlinear optical properties of novel organic materials is important as it can provide

additional information (thermal conductivity k, thermo optic coefficient, and characteristic time

tc) along with the nonlinear refractive index (n2) of the material. The Thermal lens (TL)

technique has proven to be very sensitive, accurate and simple for this purpose. The optical

nonlinearity exhibited by the material (for CW laser or long pulse width) is mainly due to the

change in thermal properties of the material, on illumination. The present work uses the TL


59

technique to measure the nonlinear refractive index due to thermal lens formation and other

thermo optic properties of the Dimethylaniline (DMA) solution in methanol. A CW Ar-ion Laser

was used as a light source and the laser beam was chopped at a frequency of 25 Hz to obtain 12

ms width pulses for observing the formation of thermal lens within the sample. The measured

and calculated values (other than n2) are compared with the values published in literature. The

n2 value is in good agreement with values measured using the standard Z-Scan method of

measuring n2.

APNLO-Poster-3

Simulation of the Dynamics of Standard Mechanical System Using the Fourth

Order Runge-Kutta Method

J. Ahammad1, S. Halder

1, S. K. Das

1,2 and E. Hoque

1

1Department of Physics, Shahjalal University of Science and Technology, Sylhet, Bangladesh

2Sylhet International University, Sylhet, Bangladesh


One of the standard mechanical systems, the coupled spring mass system, has been taken as an

experiment to simulate its dynamical behaviors in 8 different applications. The un-damped,

damped, forced vibrations and nonlinear restoring forces of the system of two springs and two

masses attached in series have been analyzed numerically using the fourth order Runge-Kutta

method. It is found that the nature of the motions depends mostly on the spring constants and the

range of the motions varies mostly with the initial conditions.

APNLO-Poster-4

Time Dependent Nonplanar Ion-Acoustic Shock Waves in a Relativistic Degenerate

Multi-Ion Plasma

L. Nahar1,*and A. A. Mamun

2

1Department of Natural Science, United International University,

Dhanmondi, Dhaka, Bangladesh 2Department of Physics, Jahangirnagr University,

Savar, Dhaka-1342, Bangladesh

*e-mail address: [email protected]

A rigorous theoretical investigation has been made to study the existence and basic features of

the ion-acoustic (IA) shock structures in unmagnetized, collisionless multi-ion plasma system

(containing degenerate electron fluids, inertial positively as well as negatively charged ions, and

arbitrarily charged static heavy ions). This investigation is valid for both non-relativistic and

ultra-relativistic limits. The reductive perturbation technique has been employed to derive the


60

modified Burgers equation. The solution of this equation has been numerically examined to

study the basic properties of shock structures. The basic features (speed, amplitude, width, etc.)

of these electrostatic shock structures have been briefly discussed. The basic properties of the IA

shock waves are found to be significantly modified by the effects of arbitrarily charged static

heavy ions and the plasma particle number densities.

APNLO-Poster-5

Positron-acoustic shock excitations in plasmas with superthermal electrons and

positrons

M. S. Alam*, M. Salahuddin, and A. A. Mamun

Department of Physics, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh


A theoretical analysis is made on the positron-acoustic (PA) shock waves (SHWs) in

unmagnetized electron-positron-ion plasma containing immobile positive ions, cold mobile

positrons, and hot positrons and electrons following kappa distribution. The cold positron

kinematic viscosity is taken into account in our considered plasma system and the reductive

perturbation method is used to derive the well-known Burgers equation (BE). It is found that

cold mobile viscous positron fluid, superthermal (kappa distributed) hot positrons and electrons,

hot electron-to-hot positron temperature ratio, and hot electron-to-cold positron density ratio

significantly modify the basic properties of PA SHWs.

APNLO-Poster-6

Dust-acoustic Solitary Waves and Their Multi-dimensional Instabilities in Four

Component Plasma with Dust of opposite Polarity and Trapped Ions

M. G. M. Anowar1,*

, I. Tasnim 1 and A. A. Mamun

2

1 Begum Rokeya University, Rangpur-5400, Bangladesh

2 Jahangirnagar University, Savar, Dhaka-1342, Bangladesh


The basic features of obliquely propagating dust-acoustic (DA) solitary waves, and their multi-

dimensional instability in a magnetized dusty plasma containing charged dust of opposite

polarity (negative and positive), Boltzmann electrons, and trapped (vortex-like) ions have been

theoretically investigated by the reductive perturbation method, and small-k perturbation

expansion technique. The combined effects of external magnetic field (obliqueness), dust of

opposite polarity, and trapped ions, which are found to significantly modify the basic properties

(amplitude and width) of small but finite-amplitude DA solitary waves (DASWs), are explicitly

examined. It is also found that the instability criterion and the growth rate are significantly



61

modified by the external magnetic field and the propagation directions of both the nonlinear

waves and their perturbation modes. The implications of our results in space plasmas are briefly

discussed.

APNLO-Poster-6

Dust-acoustic Shock Waves in Nonthermal Dusty

Plasmas with Two Population Ions

I. Tasnim1,*

, M. G. M. Anowar1, and A. A. Mamun

2

1 Begum Rokeya University, Rangpur-5400, Bangladesh

2 Jahangirnagar University, Savar, Dhaka-1342, Bangladesh


A rigorous theoretical investigation has been made on dust-acoustic (DA) shock structures in an

unmagnetized dusty plasma system whose constituents are negatively charged cold mobile dust

fluid, electrons following Boltzmann distribution, and positively charged ions of two distinct

temperatures following nonextensive (q) and nonthermal distributions, respectively. In this

study, the Burgers‟ equation has been derived by employing reductive perturbation technique

which is valid for small but finite amplitude limit. It is observed that both the nonextensive and

nonthermal ions of two distinct temperatures and dus kinematic viscosity significantly modify

the basic properties (amplitudes, width, and polarities) of the DA shock waves (DASHWs). The

effects of low (high) temperature ions following nonextensive (nonthermal) and dust kinematic

viscosity on DASHWs are examined both analytically and numerically. The implications of

these results to some astrophysical environments and space plasmas (e.g., stellar polytropes,

peculiar velocity distributions of galaxies, collisionless thermal plasma, etc.), and laboratory

dusty plasma systems are briefly mentioned.

CMP-Poster-1

First Principles Analysis of Structural, Elastic, Electronic, Optical, and TFirst

Principles Analysis of Structural, Elastic, Electronic, Optical and Thermal

Properties of MTiO3 (M = Ba, Sr)

Ifat Ara1, Fahmida Parvin

1 and A.K.M.A. Islam

2

1Department of Physics, Rajshahi University

2International Islamic University Chittagong, 154/A College Road, Chittagong 4203


The structural, mechanical, electronic, thermal and optical properties of MTiO3 (M = Ba, Sr)

have been calculated using the plane-wave ultrasoft pseudopotential technique which is based on

the First Principles Density Functional Theory (DFT) with Generalized Gradient Approximation



62

(GGA) as implemented in CASTEP code. The results are then compared with the available

theoretical and experimental data, and are found to be in good agreement.

The optimized lattice parameter, three independent elastic constants (C11, C12, and C44), bulk

moduli, shear moduli, Young‟s moduli, Pugh‟s ratio (G/B) and Poisson‟s rat io are estimated and

discussed. These results were in favourable agreement with other theoretical and existing

experimental data. In addition the longitudinal sound velocity, transverse sound velocity and

Debye temperature have been calculated.

The electronic properties such as the band structures, total and partial densities of states of

MTiO3 at zero pressure are studied. The band structure and density of states show that these

compounds are semiconductors, because band gap between valence band and conduction band

for BaTiO3 is 1.75 eV and SrTiO3 is 1.85 eV at P = 0 GPa .

Thermal properties such as bulk modulus, Debye temperature, specific heats, thermal expansion

coefficient are obtained in the pressure range from 0 to 50 GPa and temperature range 0 to 1000

K. The results are compared with other available works.

To complete the fundamental characteristics of these compounds we have analyzed the optical

properties such as the dielectric function, the reflectivity, the optical absorption coefficient, the

optical conductivity, the energy loss function and the refractive index have also been evaluated.

The prominent features in the spectra of the optical parameters are discussed.

CMP-Poster-2

Ti4SiN3: A Hypothetical MAX Phase Studied by First-principles Method

M. S. Ali, M. M. Hossain and A. K. M. A. Islam


We study a newly predicted layered-ternary compound Ti4SiN3 in its α- and β-phases. We

calculate their mechanical, electronic, optical and thermodynamic properties and then compare

these with those of other compounds M4AX3 (M = V, Ti, Ta; A = Si, Al; X = N, C). The results

show that the hypothetical Ti4SiN3 shows an improved behavior of the resistance to shape

change and uniaxial tensions and a slight elastic anisotropy. The electronic band structures for

both α- and β-Ti4SiN3 show metallic conductivity in which Ti 3d states dominate. The

hybridization peak of Ti 3d and N 2s lies lower in energy than that of Ti 3d and Si 3p states

which suggests that the Ti 3d – N 2s bond is stronger than the Ti 3d – Si 3p bond. Using band

structure we discuss the origin of different features of optical properties. The α-phase of

predicted compound has improved behavior in reflectivity compared to those of similar types of

compounds. The first-principles pseudopotential plane-wave method within the generalized

gradient approximation (GGA) has been used to verify the stability of the predicted α-phase by

comparing their total energy to that of the appropriate competing phases. The compound is

mechanically stable and at 12000C it is thermodynamically stable according to stability criteria.


63

CMP-Poster-3

Analysis of the fluctuation conductivity of underdoped c-axis oriented thin film and

sintered YBa2Cu3O7-δ: discriminating between the pseudoap and the pairing

fluctuation.

S. Nowaz1 and S. H. Naqib

2

1Lecturer in Physics, Physics department. Govt. Akbar Ali College, Ullaprar, Sirajgonj

2Department of Physics, University of Rajshahi, Rajshahi-6205, Bangladesh


We have studied paraconductivity or fluctuation conductivity of underdoped YBa2Cu3O7-δ

(Y123) high-Tc superconductors. Sintered polycrystalline and crystalline c-axis oriented thin

film samples of Y123 with similar Tc and δ values were used in this study. The excess

conductivity was determined by fitting the temperature dependent resistivity, ρ(T), data in the

temperature range from 2Tc to 300K. The extracted excess conductivity, ∆ζ(T), was then

analyzed using the existing formalisms for mean-field fluctuation conductivity. As the

compounds under study were underdoped, there was significant contribution in the downturn in

ρ(T) at high temperature due to the presence of the pseudogap (PG). The physical origin of the

PG is perhaps the most hotly debated issue in the high-Tc community. Our aim was to

investigate whether this downturn in ρ(T) due to the PG conforms with the paraconductivity

predicted by different formalisms based on superconducting fluctuations at high temperature. We

have found that none of the existing theory for ∆ζ(T) describes the experimentally observed

behavior satisfactorily. This may imply that the pseudogap phenomenon is not related with

superconducting fluctuations at high temperatures.

CMP-Poster-4

Elastic, thermodynamic, electronic and optical properties of U2Ti

M.Z. Hasan1, M.M. Hossain

2, M.S. Islam

3,4, F. Parvin

4, A.K.M.A. Islam

5

1Dept of EEE, International Islamic University Chittagong, 154/A, College Road, Chittagong

2Department of Physics, University of Yamanashi, Japan

3Kuyshu University, Japan

Department of Physics, University of Rajshahi

International Islamic University Chittagong, 154/A, College Road, Chittagong


An investigation of U2Ti, a potentially safe and heavy metal-based storage material for

radioactive tritium for fusion reactor, has been performed using pseudopotential density

functional theory. The analysis of the elastic constants and other moduli calculated for the first

time shows large anisotropy on elasticity and brittle behavior. A quasi-harmonic Debye model,

which considers the vibrational contribution to the total free energy of the system, has been used

to investigate the finite-temperature and finite-pressure thermodynamic properties of U2Ti. The


64

electronic band structure reveals metallic conductivity and the major contribution comes from U-

5f states. By analyzing the optical spectra, the origin of the various structures is also explained in

terms of the calculated electronic structure. Further the reflectivity spectrum shows that the

material is perfect reflector within the energy range 8-12.5 eV.

CMP-Poster-5

Modeling of the out-of-plane resistivity of cuprate superconductors

S.H. Naqiba,*

, M. Borhan Uddin a,b

, J.R. Cole c

a Department of Physics, University of Rajshahi, Rajshahi, 6205, Bangladesh

b Department of CSE, International Islamic University, Chittagong, Bangladesh

c Cambridge Flow Solutions Ltd., Histon, Cambridge CB24 9AD, UK


The out-of-plane (c-axis) resistivity, ρc(T), of high-Tc cuprateshave been modeled in this study.

The non- Fermi liquid like temperature dependence of ρc(T) has been described by considering

(i) the full impact of the pseudogap(PG) in the electronic density of states (EDOS) and (ii) the

presence of a quantum critical point (QCP) beneath the superconducting dome at slightly

overdoped region. This simple phenomenological model describes the experimental ρc(T) data

over a wide range of hole content (from the underdoped to slightly overdoped regions)

remarkably well. The PG energy scale, εg(dominated by the anti-nodal parts of the Brillouin

zone) extracted from the analysis of ρc(T) data was found to decrease almost linearly with

increasing hole concentration, p, in the CuO2planes. We have also discussed about the possible

origin of more conventional behavior of ρc(T) observed in the deeply overdoped side of the T–p

phase diagram in this paper.

EHM-Poster-1

Quality Control of Radionuclide VDC-405 Dose Calibrator

M. I. Hossain*1


2



Radiopharmaceuticals used in the Nuclear Medicine Department for diagnosis and therapeutic

purposes are measured by dose calibrator system. Introducing of accurate dose of radionuclide is

highly important for quality imaging as well as for treatment. Therefore, the quality control of

dose calibrator is highly valuable for nuclear medicine imaging. We perform a study to assay the

quality control and calibration of VDC-405 dose calibrator which is used to measure the activity

of the radionuclide before administrating patient. We have measured the precision, accuracy,

constancy and linearity of response for explaining correct operation of VDC-405. We obtained


65

an error within ±10% from constancy test and within ±5% from both precision and linearity test

of TC-99m and I-131 that is within the acceptable limit. Therefore, the dose calibrator VDC-405

using in Khulna Medical College Hospital (KMCH) for measuring activity of radionuclide is

well functioning.

Keywords: Nuclear Medicine, Radiopharmaceuticals, Linearity measurement, Dose calibrator,

VDC-405.

EHM-Poster-2

Determination of Elution Profile of a Radionuclide Generator System 99

Mo/99m

Tc.

S. Parvez1*


2

1Physics Discipline, Khulna University, Khulna, 9208, Bangladesh

2Institute of Nuclear Medicine & Allied Sciences,Khulna, 9000, Bangladesh

Nuclear medicine imaging using various radioisotopes play important role for diagnosing and

treating of various critical disease.Radioisotopes used in diagnosis are not found in nature but are

produced artificially. Among various radioisotopes99m

Tc is used widely because of its various

advantages. In diagnostic purpose we generally use radioisotopes of energy range 120-200 keV

and 99m

Tc is a radioisotope of energy 140 keV.This radioisotope can be found from its parent 99

Mo by β decay process.The production and separation of 99m

Tc from its parent 99

Mo can be

done very easily with the help of radionuclide generator.The studywas taking to assess in elution

of radioisotopes inInstitute of Nuclear Medicine & Allied Sciences (INMAS), Khulna. We found

that the ratio of measured activity and desired activity of 99m

Tc is in the range of94% to 99%. In

the studyit may be concluded that the elution technique of 99m

Tc is perfect.

Key words:99

Mo, 99m

Tc, Radioisotopes, Radionuclide Generator, Elution Technique.

EHM-Poster-3

Monitoring and Evaluation of Radiation Dose Level at Institute of Nuclear Medicine

& Allied sciences, Khulna

M. R. Islam1*

, H. R. Khan1 and A. K. Paul

2

1Physics discipline, Khulna University, Khulna- 9208, Bangladesh


Ionizing radiation sources is harmful for the occupational workers, patients and also for the

environment. So it is essential to monitor the radiation to ensure the health and safety of the

occupational workers and the general public and to protect the environment from the harmful

effect of ionizing radiation. For this purpose a radiation survey has been performed during a

period of eight months with a view to establish the ambient radiation level in the area of Institute


66

of Nuclear Medicine & Allied sciences (INMAS) at Khulna Medical College Hospital, Khulna.

Survey meter is used for monitoring the different location of the INMAS. We have obtained the

result 0.8 mSv in many locations and 8 mSv in one location which is within the acceptable limit.

From the result it is concluded that there is no (or less) possibilities of radiation hazard in the

INMAS.

Key words: Radiation Monitoring, Radiation Safety, Radiation hazard, Survey meter.

EHM-Poster-4

Quality Control of Dual Energy X-ray Absorptiometry (DXA)

M. A. Reza1*, H. R. Khan

1 and A. K. Paul

2



Dual energy X-ray absorptiometry (DXA) is a dominant technique for the measurement of bone

mineral density (BMD). Quality control (QC) of DXA is very important for the accuracy of

results and correct interpretation made by the physician. We have performed the quality control

procedures of Lunar DPX Pro bone densitometer according to the manufacturer‟s

recommendations and current clinical guidelines at the Institute of Nuclear Medicine & Allied

Sciences (INMAS), Khulna. The objective of this study is to maximize the performance of the

technologist as well as the reliability of the equipment (Linearity, X-ray tube output, Half value

layer, Kerma-area product, Radiation field size, Fan angle, Spatial resolution, Room safety). The

study result shows that the mean BMD reading is 1.004 g/cm2 with a standard deviation of

0.0035 and co-efficient of variation 0.34%. It also shows that the precision of the technologist is

good and there is no malfunctioning in the DXA bone densitometer.

Keywords: Nuclear Medicine, DXA, Bone mineral density, Quality control, Bone Densitometer

EHM-Poster-5

Effects of upward heat flux for the track and intensity of Tropical Cyclones (TC) in

the Bay of Bengal

1K. Fatema,

1H. R. Khan,

2M. Alam

1Department of Physics, Khulna University

2Department of Physics, Khulna University of Engineering & Technology

Comprehensive sensitivity analysis on physical parametrization schemes of Weather Research

and Forecasting (WRF-ARW core) model WRFV3.2.1 have been carried out for the prediction

of track and energy fluxes of Tropical Cyclone (TC) Sidr and Phailin that formed over the Bay

of Bengal and crossed Bangladesh and India coast during November 2007 and October 2013


67

respectively. The initial and boundary conditions of tropical cyclone are drawn from the global

operational analysis and forecast products of National Center for Environmental Prediction

(NCEP-GFS) available for the public at 1°×1o resolution. The model was run by using Kessler

(KS), Lin et al. (Lin), WSM3-class simple ice, Ferrier (FE), WSM6-class graupel and Thomson

(TH) graupel microphysics (MP) schemes coupling with different cumulus parametarization

(CP) schemes and different initial conditions. The CP schemes used to simulate the TC are Kain-

Fritsch (KF) and Betts-Miller-Janjic (BMJ). The model domain consists of 8-24oN and 77-96

oE

and has 12 km horizontal resolution with 28 vertical sigma levels. The model was run for 126

and 102-h using initial data at 0000 UTC of 11 and 12 November 2007 for TC Sidr and 120-h

using initial data of 0000 UTC of 08 October 2013 for TC Phailin.

The microphysical schemes have a major impact on tropical cyclone track and intensity.

Simulated accumulated upward heat flux (ACHFX), accumulated upward latent heat flux

(ACLHF), upward heat flux (HFX), latent heat flux (LH) and moisture heat flux (QFX) have

been analyzed to observe the impact of these parameters on the movement of tropical cyclone.

Keyword: Microphysics, WRF Model, Latent heat flux, Upward heat flux, Upward

moisture flux.

EHM-Poster-6

Design and development of an electrometer

M. N. Alim1, M. S. Islam

1, F. Hafiz

2

1Department of Medical Physics and Biomedical Engineering, Gono University, Dhaka,

Bangladesh 2Institute of Electronics, Bangladesh Atomic Energy Commission, Savar, Dhaka, Bangladesh

The facilities of radiotherapy treatment are going to increase day by day in developing countries

like Bangladesh. To deliver accurate dose to the patients it is necessary to ensure the accuracy of

the measurement during the dosimetrical activities of medical physicist which is considered as

highly sensitive issues in the department of medical physics. To quantify this issues Electrometer

is an essential equipment to measure the radiation dose from megavoltage linear accelerator in

radiotherapy centers.

This paper represents the design and development of an electrometer with the measuring range

from 0C-90C. The focus of this paper is microcontroller based high voltage power supply

which has been designed to bias the ionization chamber. But as an alternative of ionization

chamber a pulse generator gives the output of the ionization chamber. Current to voltage

converter converts the pulse generator output into a voltage. A capacitor in parallel with the

feedback resistor of the current to voltage converter stores the charges. The measured charge is

displayed on a linear scaled panel meter. For developing countries like Bangladesh it is an small

approach to develop Electrometer by our own whether this kind of instruments are imported

from abroad.


68

The study shows that the use of microcontroller based high voltage power supply in electrometer

is optimistic for dose measurement.

Keywords: Medical Physics, Electrometer, Microcontroller, Ionization Chamber.

EHM-Poster-7

Study of Metal Accumulation in Vegetables Grown in Some Selected Land of

Goalundo Upazilla

R Khatun1*, M M Ahasan

2, Shirin Akter

2, M F Uddin

1 and A N Monika

3

1Medical Physics Division, Atomic Energy Centre, Dhaka-1000

2Accelerator Facilities Division, Atomic Energy Centre, Dhaka-1000

3Medical Physics Unit, Bangladesh Atomic Energy Commission


Heavy metals can have a serious impact if released into the environment even in trace quantities

and these can enter into the food chain from aquatic and agricultural ecosystems and threaten

human health indirectly. They might be transported from soil to ground waters or may be

accumulated by plants, including agricultural crops. The aim of this study is to assess the impact

of heavy metal contaminated vegetables grown in some selected land of Goalundo Upazilla.

Samples of cabbage, radish, tomato and brinjal have been analyzed and results were compared

with those of natural limits and the safe limits of various agencies. The samples were irradiated

by the 3 MV Van de Graaff Accelerator at the Atomic Energy Centre, Dhaka (AECD) using Ion

Beam Analysis (IBA) technique. Several Standard Reference Materials are also analyzed for

validation purpose and found to be compatible. It is found that concentration of each metal

exceeded the natural limits in all vegetable samples. Except lead and chromium all the other

metals are present below the safe limits of WHO. Thus, long-term metal exposure by regular

consumption of locally grown vegetables poses potentially health problems to animal and

residents in the vicinity of the community, although no adverse health effects have as yet been

observed.

Keywords: heavy metal, trace quantities, accumulation.

EHM-Poster-8

Assessment of Elemental Profile of some Soil Samples in Comilla District of

Bangladesh using Ion Beam Analysis Technique PIXE

Shirin Akter1*

, M. Monjur Ahasan1, Md. Joynal Abedin

1, Rajada Khatun

2,

Ashrafun Nahar Monika3

1Accelerator Facilities Division, Atomic Energy Center, Dhaka-1000, Bangladesh

2Medical Physics Division, Atomic Energy Center, Dhaka-1000, Bangladesh

3Medical Physics Unit, Bangladesh Atomic Energy Commission, Dhaka-1207, Bangladesh


69

*Corresponding Author E-mail: [email protected], Cell No. 088-01721-336414

Plants are entirely dependent on soil for water, minerals and nutrients. Soil is figuratively and

literally the foundation for life on Earth. The aim of this present study is to determine the

elemental concentrations of some Soil Samples in Camilla District of Bangladesh. PIXE analysis

have been carried out using a 2.5 MeV proton beam generated with the aid of the 3 MV tandem

accelerator of the Institute Nuclear Science and Technology, Atomic Energy Research

Establishment, Savar, Dhaka. The X-ray and particle spectra were processed using MAESTRO

software and GUPIX software. The elements identified in the soil samples using PIXE were K:

6973, Ca: 2233, Ti: 3913.667, V: 140.2667, Cr: 2813.4, Mn: 691.8667, Fe: 40900.33, Co: 990.3,

Ni: 784.9667, Cu: 77.60333 and Zn: 70.18667 ppm respectively. In the present study eleven

elements are found in the soil samples. Among them six elements (K, Ca, Mn, Fe, Co, Ni, Cu,

Zn) are essential for plants growth. Co, Ni, V are required by some plants, but at very low

concentrations. The authenticity of the method was done by analyzing Standard Reference

Material IAEA soil standard 2586 and found to be compatible. This works presents a

groundwork revise for further future work.

MS-Poster-1

Study of structural properties of NixMgxFe2O4 substituted with Li2CO3

M.R.Hassan1*

, M.T.Islam1, M.B.Hossain

1, S.U.Honney

1, M.N.I.Khan

2

1Physics Discipline, Khulna University, Khulna-9208,

2Materials Science Division, Atomic Energy Centre, Dhaka, Bangladesh


The intension of this work is to study the structural properties of polycrystalline NixMgxFe2O4

(where X=0.5) ferrite. Nickel Magnesium Ferrites was substituted with Li2CO3 in various

percentages (0%, 2%, 4%, 6%) and synthesized by conventional ceramic method with 1300oC

sintering temperature for 6 hours. The particle size of the sample has been evaluated from X-ray

diffraction (XRD) method where it has been confirmed that the ferrite has absolute single phase

cubic spinal structure. The lattice constant of the ferrite varies with the increase of Li2CO3

content. From SEM images we have been observed that the ferrite is in regular in shape and the

grains are well connected with each other. The average grain size of the sample increases with

the increase of Li2CO3 content in the ferrite. The microstructural analysis have also been carried

out by SEM technique.

Key words: Ferrite, X-ray diffraction, SEM, single phase, grain size.

MS-Poster-2

Structural and magnetic properties of

0.5Bi0.7La0.3FeO3-0.5Ni0.50Cu0.05Zn0.45Fe2O4 composites


70

S. C. Mazumdar1*

, M. N. I. Khan2 and A. K. M. Akther Hossain

3

1Department of Physics, Comilla University, Comilla, Bangladesh

2Materials Science Division, Atomic Energy Centre, Dhaka 1000, Bangladessh

3Department of Physics, Bangladesh University of Engineering and Technology, Dhaka 1000,

Bangladesh


Polycrystalline 0.5Bi0.7La0.3FeO3–0.5Ni0.50Cu0.05Zn0.45Fe2O4 multiferroic composite was prepared

by ceramic method. The presence of the two phases, namely ferroelectric (Bi0.7La0.3FeO3) and

ferrite (Ni0.50Cu0.05Zn0.45Fe2O4), was confirmed by X-ray diffraction analysis. The surface

morphology of the samples was studied using field emission scanning electron microscopy

(FESEM). The X-ray diffraction and Energy-dispersive X-ray spectroscopy (EDS) analysis

confirms the formation of both the component phases and also reveals that there is no compound

respond between them. From the EDS study it is observed that the percentage of the elements in

the component phases is well consistent with the nominal composition of the composites. The

frequency dependent complex permeability was measured in the frequency range 10 kHz to

120MHz. The permeability increases and the loss factor decreases with sintering temperature.

The relative quality factor of the composite also increases with sintering temperature.

Keywords: X-ray diffraction, grain size, permeability, loss tangent

MS-Poster-3

Effects of doping on Structural, Electronic and Optical Properties of Cobalt Ferrite

Md. Ashiqur Rahmana1*, Md. Abdur Razzaque Sarker

1, Md. Abdul Gafur

2

1Department of Physics, Rajshahi University, Rajshahi-6205, Bangladesh.

2BCSIR, Dhanmondi, Dhaka-1205, Bangladesh.


Cobalt ferrite (CoFe2O4) is a promising material due to its exceptional ferrelectric, optical,

electronic and magnetic properties that are most important for device applications. Partial

substitution of iron with transition metals might play an important role to improve its different

properties useful in various applications. Degree of crystallinity, particle size, electrical

conductivity, optical absorption and low temperature magnetization of cobalt ferrite were

measured before and after doping with transition metals Zr, Zn and Cd. The crystallinity

improved for doping effect. The charge capacity and optical absorptivity also reported to be

increase for doping effects. The rare earth doped cobalt ferrite found an application in high

frequency devices and power supply due to high resistivity and low losses.

MS-Poster-4

Influence of Sr substitution on the microstructure of relaxor Ceramics


71

M.K.H Bhuiyan1*, M. A Gafur

2 , M. N. I Khan

3, M. R. Qadir

2, A. K. M. Akther Hossain

1

1Department of Physics, Bangladesh University of Engineering and Technology, Dhaka 1000,

Bangladesh 2Pilot Plant & Process Development Centre, BCSIR, Dhaka-1205, Bangladesh


E-mail:[email protected]

Relaxor ceramics show a number of desirable properties for which reason they are widely used

in devices such as memory elements, ultrasound generator, capacitors, gas igniters and many

more. Most widely used materials are Ba based ceramics. But the increase of Sr concentration in

the relaxor ceramic is expected to promote microstructural behavior.The relaxor ceramics Ba1-

xSrx(Fe0.5Ta0.5)O3 [x=0 ~0.5] prepared by solid state reaction technique. Microstructural

analysis of grain and grain boundaries of the Ba1-xSrx(Fe0.5Ta0.5)O3 ceramics was carried out

with Field Emission Scanning Electron Microscope (FESEM). The average grain size was

calculated by linear intercept method. The average grain size varies from for x=0.1 and 0.3 in

Ba1-xSrx(Fe0.5Ta0.5)O3relaxor ceramics the grain size increased but for x=0.2 and 0.4 in Ba1-

xSrx(Fe0.5Ta0.5)O3 ceramics the grain size decreased. Grain size is strongly influenced by the

rate of nucleation and grain growth and temperature. The microstructure properties have an

influence on Sr substitution of relaxor ceramics.

MS-Poster-5

Study of electrical and magnetic properties of NixMgxFe2O4 with the addition of

Li2CO3

M.R.Hassan1, M.T.Islam

1, M.B.Hossain

1, S.U.Honney4, D.K. Saha

2, M.N.I.Khan

2

1Physics Discipline, Khulna University, Khulna-9208,



As the popularity of ferrite compounds in the field of modern technology, we have been studied

the addition of Li2CO3 with Ni-Mg ferrite and from this work we have also been studied the

change in electrical and magnetic properties of Ni-Mg ferrite after adding Li2CO3. The samples

were prepared by solid state reaction method and sintered at 1300oC. From XRD analysis it has

proven been that the ferrite has single phase cubic spinal structure. DC resistivity measured as a

function of temperature. As a function of frequency the AC conductivity was measured in

association with specific resistivity, dielectric constant, loss factor and relative quality factor at

constant room temperature with the help of impedance analyzer. The resistivity, loss factor and

dielectric constant decreases with the increase of frequency and its mentioning the decrease in

polarization. The activation energy was decreases with the increase of temperature. Vibrating

sample magnetometer (VSM) was used to evaluate magnetic properties and hysteresis curves.

The saturation magnetization has been recorded when coercivity decreases with its thickness.


72

Key words: XRD, single phase, DC and AC resistivity, impedance analyzer, VSM, saturation

Magnetization, coercivity.

NPP-Poster-1

Participated in Proficiency Tests for QA/QC of NAA

K. Naher, S.M. Hossain, , M.A. Islam, U. Tamim, S. Das

Institute of Nuclear Science & Technology, Atomic Energy Research Establishment, G.P.O. Box

No.3787, Dhaka-1000, Bangladesh


Quality Control and Quality Assurance (QA/QC) Program is essential for any laboratory.

Participation of Proficiency Tests or Inter-comparison Exercises is one of the vital components

of a QA/QC program of the laboratory. The BAEC Neutron Activation Analysis (NAA)

Laboratory frequently participate such types of activities organized by international forums like

FNCA, IAEA, etc. Recently, the NAA Laboratory has participated in two Proficiency Tests (PT)

organized by FNCA: (i) Analysis of Japanese three stream sediments (ii) One Australian

Hawkesbury River Sediment, one Japanese stream sediment and one Australian mixture of

sausage sludge and loam. Several laboratories from nine countries namely, Australia,

Bangladesh, China, Indonesia, Japan, Kazakhstan, Malaysia, Thailand and Vietnam participated

in two PTs. In our NAA laboratory we have applied our normal laboratory practices and

protocols to analyze all the samples and the analytical results were submitted to the competent

authority for statistical analysis. All the data provided by the participating laboratories have been

compiled and statistical analysis has been performed by the FNCA Authority. In both PTs our

results are pretty close to the assigned values. In some cases our results are even better compared

to some other member states. This ensures the quality of the BAEC NAA laboratory.

NPP-Poster-2

Anharmonicity in light nuclei near drip lines

Anup Majumder1 and F. Bary Malik

2,3

1University of Phoenix Online, Phoenix, Arizona, 85034, USA.

2Physics Department, Southern Illinois University, Carbondale, Illinois 62901-4401,

U.S.A. 3Physics Department, Washington University, St. Louis, Missouri 63130, U.S.A.

Single-particle energy levels of nucleons moving in an anisotropic harmonic oscillator potential

along with a spin-orbit and an orbit-orbit interaction have been calculated. The model proposed

herein incorporates shapes generated by higher multipolar anisotropies other than the quadruple

one. The gaps among the energy levels are strongly dependent on the degree of anisotropy and

hence, affect the nucleonic separation energies. For large anisotropies, this characteristic


73

disturbs the occurrences of the usual magic numbers and the sequential ordering of the shells

characterized by principal quantum number, N, associated with the elementary shell model. For

large asymmetries, the states characterized by higher N, may come down and lie below the

energies of the states with lower N and vice versa. This feature of the model provides a natural

explanation of intruder states or the island of inversion observed experimentally. For certain

choices of the parameters, the large gaps in single nucleonic separation energies could occur at

neutron numbers, 10,18,30, and 32 as observed, respectively, in 20

Ne, 28

Ne, 52

Ti, and 54

Ti. For

neutron as well as proton number 14, the magnitude of this energy gap depends strongly on the

choice of the strength of the spin-orbit and orbit-orbit terms. The model provides a simple

understanding of the observed fact that some nuclei with proton or neutron number 14 sometimes

exhibit this gap but not others. It also provides an interesting insight of having a low-laying

(1/2−) state in

7He, and confirms the ground state spin and parity of

11Be to be (1/2

+) and those

of 9He to be (1/2

+), both of which have been contentious. This investigation indicated the

density distribution, i.e., the shapes of many of nuclei near drip line to be anisotropic having a

symmetry about their body-fixed z-axis.

NPP-Poster-3

Non-monotonic potential description of alpha-40

Ca refractive elastic scattering

M. Shahinur Islam*1

, M. M. Billah1, S. Hossain

2, A. S. B. Tariq

1 and A. K Basak

1

1Department of Physics, University of Rajshahi, Rajshahi 6205, Bangladesh

2Department of Physics, Shahjalal University of Science & Technology, Sylhet, Bangladesh


Refractive nuclear scattering leading to the Airy structure in nuclear rainbow has been a subject

of considerable attention over the last few decades as it can probe the interaction potential well

in the nuclear interior. This is a consequence of the fact that the rainbow scattering arises from

the interference of partial scattering amplitudes with L-values significantly lower than the

grazing L-values responsible for Fraunhofer diffraction scattering. The broader angular widths

and faster angular excursion with incident energy of rainbow oscillations are distinctive features

which make the refractive structure easily distinguishable from the diffractive scattering.

Alpha being compact with BE=28.3 MeV, its interaction with the doubly magic and as such

weak-absorbing 40

Ca target provides ideal conditions for producing nuclear rainbow structure.

The nuclear rainbow, generated from the refractive scattering, in the angular distributions of α-

elastic scattering by 40

Ca has been studied in details for the first time using non-monotonic (NM)

α-potential in the optical model. The starting parameters of the NM potentials are derived semi-

microscopically by the energy-density functional (EDF) formalism. The NM potentials with

volume integrals JR/(4A) 100 MeV.fm3 are found to describe reasonably the refractive

structures at the 36.1, 39.6 and 42.6 MeV energies.

The present study with the shallow NM optical potentials suggests that the usual claim in the

literature that “deep attractive real potential in addition to weak absorption is essential for the


74

occurrence of refractive scattering” is to be rephrased as “absorption has to be adequately weak

compared to the attractive part of the real potential for the occurrence of refractive scattering”.

NPP-Poster-4

Prospects of heavy multiquark states in QCD

Mahmud Ashraf Shamim and Abdullah Shams Bin Tariq

Department of Physics, University of Rajshahi


The prospect of tetraquark, pentaquark and dibaryon systems formed of heavy (c or b) quarks has

received new impetus following the recent results from LHCb and COSY. The prospect for

heavy multiquark states is discussed and studies in lattice QCD suggested to improve the

understanding of the issue.

NPP-Poster-5

Non-monotonic shallow nucleus-nucleus potential for heavy-ion elastic scattering

M. Sujan Islam1, R. Majumder

1, S. Hossain

2, Athoy Nilima

3, M. A. Sayed

1,4,

M. M. Billah1, M.M.B. Azad

1, A. S. B. Tariq

1, M. A. Uddin

1, A. K. Basak

1

1Department of Physics, University of Rajshahi, Bangladesh

1Department of Physics, Shahjalal University of Science & Technology, Sylhet

1Department of Physics, University of Dhaka, Bangladesh

1Department of Physics, North Western University, Khulna, Bangladesh

„Goldberg criterion‟ tells that at sufficiently high energies, where pronounced refractive

minimum is followed by an „exponential-type falloff‟ in the angular distribution, discrete

ambiguities are eliminated for the deep monotonic potential [3]. This is also found to be valid for

the heavy-ion (HI) scattering, namely the 16

O+16

O elastic scattering [4]. The criterion is also

confirmed in the work of Bartnitzky et al. [5] on the 16

O+16

O elastic scattering in the energy

range of 250 - 704 MeV where a dominance of refractive scattering with the occurrence of the

exponential-type falloff at energies beyond 250 MeV. Their finding „using model-independent

potentials‟ suggests that HI elastic scattering data unambiguously favour deep HI potentials. The

present study reports the result of analysis of the 16

O+16

O elastic scattering data at 350 MeV

using the NM shallow potential.

[1] K. A. Brueckner, S. A. Coon, J. Dabrowski, Phys. Rev. 168 (1968) 1184

[2] S. Hossain et al., J. Phys. G 40 (2013) 105109

[3] D.A. Goldberg, S. M. Smith, Phys. Rev. Lett. 29 (1972) 500

[4] E. Stiliaris et al., Phys. Lett. B 223 (1989) 291


75

[5] G. Bartnitzky et al., Phys. Lett. B 365 (1996) 23

Public Lecture Session

19 April, Sunday 1545-1830, Kazi Nazrul Islam Auditorium

Chair: Professor M Aminul Islam, Co-Chair:

Public Lecture-1

Cancer and Its Treatment:

Global Evolutionary and Revolutionary Advancements of Technologies Including

Commendable Achievements and Impediment in Bangladesh

Sadiq R. Malik

Radiation Oncology Division, Delta Medical College and Hospital, Dhaka-1216, Bangladesh


Cancer detection and treatment evolved to the present status since 1895 and 1903 from the

production of external radiation and that from a radioactive substance by W.C. Rontgen and

Madam Curie respectively. The future of Cancer Therapy, curative or palliative, will encounter

the combinations of immunotherapy, targeted therapy or radiation therapy or an adjunct or

adjuvant of these modalities. Cancer cells forget its genetic code and, therefore, continue to grow

to invade the surrounding tissues unlike normal cells. Ionizing Radiations proved to be very

effective in killing these cancerous cells. The rapid growth of technology in delivering the

precise radiation dose to Cancerous Cells has established the need of Medical Physicists

globally. Radiation Therapy has proved to be an important modality of Cancer Treatment where

progresses in Hardware and Software have compelled the Cancer Centers to develop the efficient

human ware viz the Medical Physicist.

Historically, Bangladesh used the first teletherapy machine (Co-60) in 1953 followed by Dhaka

Medical College Hospital (DMCH; 1959) and Delta Hospital (1995). Delta Hospital was

declared as the “Center of Excellence” in 2001. The detection of more than 100 different types of

cancer and the availability of linear accelerators (LINAC), have encouraged acquiring LINAC

since 2006, in various hospitals, including Delta Hospital Ltd. Currently, there are 9 and 5

Cancer Centers owned by government and private organizations respectively. Bangladesh has 15

Linear Accelerators, 10 Cobalt-60 teletherapy machines besides 7 Cobalt-60 and 6 Ir-192

Brachytherapy HDR Units. Therapy Machines now has revolutionized the cancer treatment with

advanced accessories from dynamic wedge to multi leaf collimators, MLCs to Electronic Portal

Imaging (EPID) to True Beam and Filament Free Filter (FFF). Imaging systems like CT-scanner,

MRI, PET-CT and Ultra Sound (US) have contributed immensely towards 3D (three dimensions)

and IMRT (Intensity Modulation Radiation Therapy). Organs at Risk (OARs) like Spinal Cord,

Lung, Brain matters, eyes, etc. and other normal tissues are thus saved as advanced treatment


76

planning system (TPS) is being used for conformal treatment. The transition, therefore, from 2D

to 3D to IMRT to Stereotactic Radio surgery and brachytherapy treatments, on the other hand,

for cervical and interstitial breast cancers, have been routinely carried out at different hospitals.

Delta Hospital alone has delivered more than 2500 treatments, using Co-60 HDR (High Dose

Rate) source.

Quality Assurance, at intervals and as needed, of Machine parameters, beam quality, dosimetric

precision are evaluated, measured and checked by Medical Physicists.

A qualified and trained Medical Physicist must perform therapeutic, imaging, nuclear, medical

health physics, cancer therapy using radiation, CT, MRI, X-Rays, US, Mammography, SPECT,

PET and regulatory compliance for radiation safety of patients and radiation workers of the

organization. A Medical Physicist, therefore, should be accredited in the disciplines of Radiation

Oncology Physics, Nuclear Medicine, Diagnostic Radiology and Biomedical Engineering. The

accreditation is essential and valuable for a Medical Physicist and this must be done by a

BOARD comprising of DU- BMPT department, BMPA, Oncology Society/Club, Ministry of

Science and BAERA and Ministry of Health (DG Health).

The argument and guidelines as outlined above will open, not impede, the JOB

OPPORTUNITIES for the Medical and Radiation Oncology Physicists in Private, Government

and University Hospitals, for that matter, in Government Organizations, Physicians Service

Group and Industry.

Public Lecture-2

Rooppur NPP Project and Safety of Generation-III+ VVERs

Engr. M. Ali Zulquarnain

Bangladesh Atomic Energy Commission

[email protected]

Science 2010 Bangladesh is working with the Russian Federation (RF) for implementing

Rooppur Nuclear Power Plant (NPP), a long cherished dream project of our nation. An

Intergovernmental Agreement (IGA) was signed in Nov 2011 between the two governments for

implementation of the project with two VVER (Water Water Energy Reactor; Russian Word

„Vada” means Water) power units following G-to-G (govt. to govt.) approach. Russian

government granted a credit of 500 million US dollar in January 2013 for implementation of the

works under preparatory phase of the project which includes feasibility evaluation, preparation

of EIA (Environmental Impact Assessment) report, PSAR (Preliminary Safety Analysis Report),

PAS (Probabilistic Safety Analysis) report, design and working documents for preparatory

constructions, design documentation for the NPP, preparatory construction works, supply and

installation of various equipment needed, etc. To this end, three contracts has already been signed

between BAEC (Bangladesh Atomic Energy Commission) and ASE (Atomstroyexport, Russian

state owned NPP construction company) and activities under the contracts are being

implemented now taking September 2016 as the targeted completion date. It is expected that the


77

General Contract will be signed by the end of 2015 and construction of the NPP will begin in

2016 and the first reactor unit will be completed and connected to the grid in 2021. Reactor to be

used for powering the Rooppur NPP will be Gen-III+ VVERs. More than fifty VVER type

reactors are in operation in different parts of the world with a cumulative operating experience of

about 1600 reactor-years. VVER is proven technology that incorporates both engineered/active

and passive safety features. The engineered safety features include- Emergency reactor shutdown

system, Emergency boron injection system, Containment spray system, High pressure safety

injection system, Primary system emergency cool down and fuel pool cooling system, etc. The

passive safety systems of the Gen-III+ VVER reactors use natural forces like, gravity, natural

convention, compressed gas, etc. for activation of the safety functions. These include- Passive

heat removal systems (PHRS), Passive hydrogen recombiners, Passive quick boron injection

systems, etc. The presentation focuses on the above mentioned safety features of the Gen-III+

VVER reactors and gives short overviews of some of the passive safety systems.

List of Registered Participants

Name Category Address

Md. Abdur Razzaque Sarker Acad. Staff Associate Professor, Physics, RU

Mst. Rokeya Khatun Local Student Dept. of Physics, R.U.

Ifat Ara Local Student Dept. of Physics, R.U.

Arifuzzaman Rajib Local Student Applied Physics & E E

Md. Siam Uddin Local Student 331, North Shahjahanpur


78


Mohammad Julhash Miah Local Student PhD Fellow, BUET

Md. Hasnat Kabir Acad. Staff Info. & Commu. Eng. RU

Md. Ashiqur Rahman Local Student MSc thesis Student, RU

Kabbo Sona Local Student District:bogra thana:shibgonj

Rozina Rose Local Student District:bogra thana:shibgonj

Md. Shahnowaz Acad. Staff Puthia

Al Momin Md. Tanveer Karim Acad. Staff Dept. of Physics, RUET

Md. Abdul Hadi Shah Acad. Staff Assist. Prof of Physics, RUET

Md. Imran Hossain Local Student 302, K B Ahsanullah Hall, KU

Preangka Roy Local Student nx-116, Aparajita hall, KU

Md. Rakibul Islam Local Student 423, Khan Jahan Ali Hall, KU

Md. Shohel Parvez Local Student 302, K B Ahsanullah Hall, KU

Razibul Hasan Local Student Physics Discipline, KU

Nazmul Alim Local Student Gono University, Savar

Farhana Sultana Reya Local Student 132, Aparajita hall, KU

Arifuzzaman Rajib Local Student MSc, University of Rajshahi

Abul Kalam Azad Acad. Staff Rayermohal College

Samiron Mistry Local Student 302, K B Ashanulla Hall, KU

Md. Ali Reza Local Student Khan jahan Ali Hall, KU

Kaniz Fatima Local Student Fulbarigate, Khulna

Abdullah Al-Mamun Local Student Khan jahan Ali Hall, KU

Sohag Parves Local Student Khan Jahan Ali Hall, KU

Md. Emrul Kayesh Acad. Staff Dept. of Mat. Sc. & Eng., RU

Rezaul Karim Local Student Madar Bux hall, RU

Md Taufiqul Islam Local Student Dept. of Phys, RU

Md Mozammel Haque Local Student Dept. of Phys, RU

Md Mominul Islam Local Student Dept. of Phys, RU

Md Moinul Islam Local Student Dept. of Phys, RU

Md Parvez Ahammad Local Student Dept. of Phys, RU

Md Arman Hossain Local Student Dept. of Phys, RU

Mst. Moushumi Khatun Local Student 444, Rahmatunnesa Hall, RU

Md. Mydul Islam Local Student 330, Madar Bux Hall, RU

Afsana Azam Acad. Staff Dept. 0f Physics, DUET

Mst. Sharmin Afroz Local Student 457, Rokeya Hall, RU

Rojoni Biswas Eti Local Student 301, Rahmatunnesa Hall, RU

Unnati Rani Dash Local Student 412, Rahmatunnesa Hall, RU

Piya Biswas Local Student 208 Taposi Rabeya Hall, RU

S N M Raqibul Haque Local Student 149, Tarokhadia, Rajshahi

Mst. Irin Naher Local Student Rahamotunnesa Hall, RU


79


Bushra Tasnim Local Student Begum Khaleda Zia Hall, RU

Prof M Aminul Islam Acad. Staff Professor of Physics, RU

Prof M Golam Mortuza Acad. Staff Professor of Physics, RU

Prof. M Alfaz Uddin Acad. Staff Professor of Physics, RU

Prof F Nazrul Islam Acad. Staff Professor of Physics, RU

Prof M Khalilur Rahman Khan Acad. Staff Professor of Physics, RU

Prof Irine Banu Lucy Acad. Staff Professor of Physics, RU

Prof M Rafiqul Ahsan Acad. Staff Professor of Physics, RU

Prof A Shams Bin Tariq Acad. Staff Professor of Physics, RU

Prof M Obaidul Hakim Acad. Staff Professor of Physics, RU

Dr Fahmida Parvin Acad. Staff Professor of Physics, RU

Mr M Masum Billah Acad. Staff Assist. Prof of Physics, RU

Dr Samiul Islam Sarker Acad. Staff Assist. Prof of Physics, RU

Mr M Alamgir Hossain Acad. Staff Assist. Prof of Physics, RU

Mr M Ismail Hossain Acad. Staff Assist. Prof of Physics, RU

Prof Saleh Hasan Naqib Acad. Staff Professor of Physics, RU

Dr Laila Arjumand Banu Acad. Staff Asso. Prof. of Physics, RU

Mst. Rokeya Khatun Local Student 312, Monnuzan Hall

Md Borhan Uddin Acad. Staff Assist. Prof of Physics, RU

Md Shariful Islam Local Student BSc (Hons.) 4th year, RU

Dr Raihana Shams Islam Acad. Staff Asso. Prof. of Physics, RU

Dr Atiqur Rahman Patoary Acad. Staff Asso. Prof. of Physics, RU

Sajib Halder Local Student Dept. of Physics, SUST

Sonet Kumar Saha Acad. Staff 32 Monipur Ghat, Holding 276

Prof Enamul Haque Acad. Staff Professor of Physics, RU

Prof A K Fazlul Haque Acad. Staff Professor of Physics, RU

Mr A F M Abdul Wahed Acad. Staff Asso. Prof. of Physics, RU

Dr M Monirul Haque Acad. Staff Assistant Professor, RU

Prof M Shafiqul Islam Acad. Staff Professor of Physics, RU

Prof Somnath Bhattacharjee Acad. Staff Professor of Physics, RU

Prof M Muzibur Rahman Acad. Staff Professor of Physics, RU

Mst. Naznin Afroj Local Student 482, Munnujan Hall, RU

Mr Soheb Ali Local Student BSMR Hall, RU

Ruma Parvin Local Student Munnujan Hall, RU

Mr Ihtisham Qabid Local Student S Habibur Rahman Hall, RU

Md Masum Billah Azad Local Student M Phil Fellow, RU

Md. Matiur Rahman Local Student 447, S H Rahman Hall, RU

Md Hayet Mahmud Local Student MSc, University of Rajshahi

Mrs Dilruba Akter Banu Acad. Staff Asso. Prof. of Physics, RU


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Prof Arun Kumar Basak Acad. Staff Prof Emeritus, Dept of Phys,RU

Prajna Paramita Bhattacharjee Local Student BSc 3rd Year, RU

Md Abdul Hadi Local Student M Phil Fellow, RU

Md Sujan Islam Local Student MSc, University of Rajshahi

Mst. Popy Khatun Local Student MSc, University of Rajshahi

Tania Parvin Local Student MSc, University of Rajshahi

Mousumi Khatun Local Student MSc, University of Rajshahi

Monira Sharmin Local Student MSc, University of Rajshahi

Firdaus Ara Local Student MSc, University of Rajshahi

Monira Jannatul Kobra Acad. Staff Assist. Prof of Physics, RU

Rinku Majumder Local Student MSc, University of Rajshahi

Md Tahidul Islam Local Student MSc, University of Rajshahi

Md Jahangir Alom Local Student MSc, University of Rajshahi

Md Romman Mostakim Local Student MSc, University of Rajshahi

Lutfar Rahman Local Student MSc, University of Rajshahi

Md Alamgir Hossain Local Student MSc, University of Rajshahi

Md Kamruzzaman - Local Student MSc, University of Rajshahi

Md Khademul Bashar Local Student MSc, University of Rajshahi

Md Ekhtiar Alam Local Student MSc, University of Rajshahi

Md. Roknuzzaman - Acad. Staff Lecturer of Physics, JUST

Sheikh Dobir Hossain Acad. Staff Lecturer of Physics, JUST

Md Rabiul Hasan Student KU

Md Shahinur Islam Local Student MSc, University of Rajshahi

Mohammad Rayhan Uddin Acad. Staff Gono University, Savar

Dr M Rezaur Rahim Acad. Staff Asso. Prof. of Physics, RU

Forida Yeasmin Local Student MSc, University of Rajshahi

Khandker Mahmudul Hasan Acad. Staff Assistant Professor, RU

Md. Leaket Ali Acad. Staff Assistant Professor, RU

International Conference on Advances in Physics 2015Mr. Soumitra Banerjee, TSCC, RU . International...

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