Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam...
Transcript of Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam...
![Page 1: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/1.jpg)
Ion Beam Analysis
Lukhwa Rendani Physics Department University of the Western Cape, South Africa
Nolufundo Sintwa University of Fort Hare, South Africa
Sinazo Mselana University of Fort Hare, South Africa
Supervised by A.P. Kobzev Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research,
Dubna, Russia
![Page 2: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/2.jpg)
Aim
• To determine the elemental composition of thin films on the surface solid Target
• Enables technology for thin film scientists and engineer
• Possible applications are:
– Microelectronics
– Forensic etc.
JINR Student Practice 2014 2 9/24/2014
![Page 3: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/3.jpg)
Sinazo Mselana
University of Fort Hare
![Page 4: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/4.jpg)
Part 1: Accelerator & PIXE
JINR Student Practice 2014 4 9/24/2014
![Page 5: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/5.jpg)
Parameters of EG-5 Accelerator
• Energy Region : 0.9-3.5Mev
• Beam intensity for H+ :30μA
• Beam intensity for He+ :10μA
• Energy Spread <500 eV
• Number of beam lines : 6
JINR Student Practice 2014 5 9/24/2014
![Page 6: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/6.jpg)
PIXE- Particle Induced X-ray Emission Method
• Proton beams are mainly used
– Ionization of atom
– Si(Li) Detector
– Energy resolution about 150eV
JINR Student Practice 2014 6 9/24/2014
![Page 7: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/7.jpg)
Moseley’s law
Moseley law
• Rc – Rydberg’s constant
• Z – atomic number
• Sn – screening constant
• n – main quantum number
• ν - frequency of X-ray quantum
JINR Student Practice 2014 7 9/24/2014
![Page 8: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/8.jpg)
PIXE Results
JINR Student Practice 2014 8 9/24/2014
![Page 9: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/9.jpg)
Aerosol analysis by PIXE & RBS
JINR Student Practice 2014 9 9/24/2014
![Page 10: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/10.jpg)
Nolufundo Sintwa
University of Fort Hare
![Page 11: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/11.jpg)
Part 2:RBS-Rutherford Backscattering Spectrometry Method
• Near-surface layer analysis of solids
• Elemental composition
• depth profiling of individual elements
• Very sensitive for heavy elements
• Less sensitive for light elements
JINR Student Practice 2014 11 9/24/2014
![Page 12: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/12.jpg)
Experimental chamber
JINR Student Practice 2014 12 9/24/2014
![Page 13: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/13.jpg)
RBS
• Kinematic Factor
• Cross-section
JINR Student Practice 2014 13 9/24/2014
![Page 14: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/14.jpg)
RBS Program used for the analysis of experimental results was SIMNRA
Experimental condition
• Calibration – Offset=27.95keV
– Energy/channel=2.185
• Number of particles – 1.56E11
• Thickness – Nb =161nm
400 600 800
0
500
1000
1500
2000
2500
3000
3500
4000
Co
un
ts
channel
Energy [keV]
experimental
simulated
Sb
Nb
substrate: Si
E=2297keV
=1700
JINR Student Practice 2014 14 9/24/2014
![Page 15: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/15.jpg)
Rendani Lukhwa
University of the Western Cape
![Page 16: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/16.jpg)
Part 3:ERD-Elastic Recoil Detection
• Forward Recoil
• Good for light elements(H,D)
• Al foil
JINR Student Practice 2014 16 9/24/2014
![Page 17: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/17.jpg)
RBS
200 400 600
0
1000
2000
3000
4000
5000
Cou
nts
channel
experimental
simulated
C 41%
H 19%
Si 40%
H 13%
C 45%
Si 42%
H 13.5%
Si 86.5%
H 3%
Si 97%
JINR Student Practice 2014 17 9/24/2014
![Page 18: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/18.jpg)
ERD
200 400 600
50
100
150
200
250
300
Cou
nts
channel
experimental
simulated
Si 40%
H 19%
C 41%
H 13%
C 45%
Si 42%H 13.5%
Si 86.5%
H 3%
Si 97%
JINR Student Practice 2014 18 9/24/2014
![Page 19: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/19.jpg)
Conclusion
• Three methods were used in order to obtain information about elements depth contents for different elements from hydrogen to barium
• Sensitivity of method for heavy elements less than 0.001 atomic %
JINR Student Practice 2014 19 9/24/2014
![Page 20: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/20.jpg)
Acknowledgements
• Dr Mirosław Kulik
9/24/2014 JINR Student Practice 2014 20
![Page 21: Ion Beam Analysisnewuc.jinr.ru/img_sections/file/Practice2014/SA+Belarus/Student... · Ion Beam Analysis Lukhwa Rendani Physics Department University of the Western Cape, South Africa](https://reader031.fdocuments.us/reader031/viewer/2022041023/5ed5cac2b1898c3e6b1ec5b0/html5/thumbnails/21.jpg)
Thanks for your attention
9/24/2014 JINR Student Practice 2014 21
From left to right : Dr A.P Kobzev, Sintwa Nolufundo, Lukhwa Rendani, Sinazo Mselana and Dr Mirosław Kulik