Dense Matter Physics with Rare Isotopes

Youngman Kim

(RISP, IBS)

February 22, Kyoto University QCS 2017

Contents

• RISP in brief

• Asymmetric (finite) matter in a PD model

• DJBUU: a new transport code

• Summary

○ Goal : To build a heavy ion accelerator complex RAON for rare isotope science researches in Korea ○ Project period : 2011.12 - 2021.12 ○ Total Budget : ~$ 1.43 billion (Facilities ~ $ 0.46 bill., Bldgs & Utilities ~ $ 0.97

bill.) - include initial experimental apparatus

Rare Isotope Science Project (RISP)

Low Energy Experiments Nuclear Astrophysics

Driver LINAC

LEBT

ECR-IS (10keV/u, 12 pμA)

RFQ (500keV/u, 9.5 pμA)

MEBT

SCL1 (18.5 MeV/u, 9.5 pμA)

Charge Stripper SCL2 (200 MeV/u, 8.3 pμA for

U+79) (600MeV, 660 μA for p)

Post Accelerator

CB : Charge Breeder HRMS : High Resolution Mass Separator

MEBT

ECR-IS

Cyclotron (p, 70 MeV,

1mA) High-precision Mass Measurement

High Energy Experiments Nuclear Structure/ Symmetry Energy

RF Cooler

RFQ CB HRMS ISOL

Target

IF Target

IF Separator

High intensity RI beams by ISOL & IF

ISOL : direct fission of 238U by 70MeV protons

IF : 200MeV/u, 8.3pμA of 238U

High quality neutron-rich RI beams

132Sn with up to ~250MeV/u, up to ~108 pps

More exotic RI beams by ISOL+IF

μSR, Bio-medical

RAON Concept

SCL3 (18.5 MeV/u)

* In-flight (IF) facilities: a high energy ion beam is fragmented in a suitable thin target and the reaction products are and then transported to the secondary target.

* ISOL-type facilities: radioactive ions are produced at rest in a thick target either by direct bombardment with particles from a driver accelerator or via fission induced both by fast and thermal secondary neutrons.

RAON Site : Sindong in Daejeong

Current RISP Office

~11 km

Basic design was finished Dec. 2015 A construction company will be selected in Sept. 2016. i

RAON Layout: Experimental system

Low Energy

Exp. Bldg Ultra-low Exp. Bldg

High

Energy

Exp. Bldg

CLS HPMMS

Neutron Facility

KOBRA

Bio-medical facility

mSR

LAMPS

Main facility for nuclear structure and nuclear astrophysics studies with low-energy stable and rare isotope beams

Cost-effective PTs at RAON??? Hmm, mostly no, but …

Liquid-drop model

But, results are quite model-dependent!

K. Kim, S. H. Lee and YK, JKPS 55, 1381 (2009)

Deconfinement transition with non-zero asymmetry in a hQCD model

From RBUU simulation

Yujeong Lee, Chang-Hwan Lee, YK, T. Gaitanos, JKPS 69 1430 (2016)

“Intense” RI beams

vacuum

Quarks and gluons

Hadrons

Asymptotic freedom

Infrared slavery

Quantum tunneling

Origin of nucleon mass

Origin of elements

Simplicity from complex systems

Strong interactions at work

Chemical history of the universe

Energy generation in stars

Stellar explosions

Properties of neutron stars

beyond the Standard Model

Limits of nuclear existence

Phases of nuclear matter

Supercomputers

ECR SI Beam RFQ Beam SCL Demo Beam SCL SI Beam

IF RI Beam

ISOL SI Beam Cyclotron ISOL RI Beam

DAY-1 Experiment

Begin Construction

Start Utility Supply

Completion

RISP Milestones and Schedule

• So, Daejeon will be busy with RIs in some years.

• Anything else that comes with Daejeon? - Daejeon BUU

- Daejeon 16 NN interaction

• Anything else in Daejeon?

- OMEG 2017

Asymmetric (finite) matter in a PD model

Why? To study an origin of nucleon mass in terms of a QCD effective model.

Linear sigma-model

* SSB

Parity doublet model

“Linear sigma model with parity doubling,” C. E. DeTar and T. Kunihiro, Phys. Rev. D 39, 2805 (1989)

Introduce two nucleon fields that transform in a mirror way under chiral transformations:

The state N+ is the nucleon N(938). while N- is its parity partner conventionally identified with N(1500).

Cf.

D. Zschiesche, L. Tolos, Jurgen Schaffner-Bielich, Robert D. Pisarski, Phys.Rev. C75 (2007) 055202

Cold, dense nuclear matter in a SU(2) parity doublet model

D. Zschiesche, L. Tolos, Jurgen Schaffner-Bielich, Robert D. Pisarski, Phys.Rev. C75 (2007) 055202

Any sensitive physical quantities to m0?

Nuclei with RTF approximation

Y. Motohiro, YK, M. Harada, in progress

Parity doublet model in relativistic continuum Hartree-Bogoliubov theory

RCHB theory properly takes into account the pairing correlation and the coupling to (discretized) continuum via Bogoliubov transformation in a microscopic and self-consistent way. [J. Meng, et al, Prog. Part. Nucl. Phys. 57 (2006) 470]

Spherical RCHB code was provided by Jie Meng (Peking Univ.). Main difference is the behavior of sigma mean field. Revised the code to incorporate the difference. As a warm-up, we use the simple PD model by Zschiesche, et

al, and assume spherical symmetry.

D. Zschiesche, L. Tolos, Jurgen Schaffner-Bielich, Robert D. Pisarski, Phys.Rev. C75 (2007) 055202

Cold, dense nuclear matter in a SU(2) parity doublet model

Ca (Z=20)

Projectile

Target

DJ BUU: a new transport code

Transport model

Boltzmann-Uehling-Uhlenbeck(BUU) Quantum Molecular Dynamics (QMD)

Less fluctuation, Good to study EOS Not good for event generator

Good for event generator (event by event analysis)

More fluctuation, More CPU time

Simulation sample by QMD 197Au+197Au at b=7fm with the beam energy 100MeV/n (averaging 1000 events)

Figure taken from Kyungil Kim (RISP, IBS)

• Initialization

• Propagation

• Collisions

• Clustering

• De-excitation (statistical decay model)

General flow

New Heavy-Ion Transport Code : DJBUU

Current collaboration members: S. Jeon (McGill, chair) at RISP for 2015.10~2016.01 Y. Kim, K. Kim (RISP, IBS) C.-H. Lee, Y.M. Kim, M.K. Kim (PNU)

Summary

RAON, FRIB, RIBF, CSR, FAIR, NICA …

New Clear Physics!!!

Observations + Supercomputers

14th International Symposium

OMEG2017

Origin of Matter and Evolution

of Galaxies

Daejeon, Korea

June 27-30, 2017

https://indico.ibs.re.kr/event/135/

Topics to be covered

• Big Bang Cosmology and Primordial Nucleosynthesis

• First Generation Stars and Galactic Chemical Evolution

• Meteorite Analysis and Isotopic Abundance

• Explosive Stellar Objects and Nuclear Physics

• Astronomical Observations with Light, X-, γ- and Cosmic-

Rays

• Stellar Evolutions and Hydrostatic Burning Processes

• Experimental Nuclear Physics for Astrophysics

• Theoretical Nuclear Physics for Astrophysics

• Nuclear Matter and Neutron Stars

• Nuclear Data for Astrophysics and Related Topics

• Underground Nuclear Astrophysics

• Next generation RI Beam Facilities for Nuclear

Astrophysics

Where is Daejeon, Korea?

OMEG1988 - 2013

Tokyo, Atami, Osaka,

Sapporo, Tsukuba,

Japan

OMEG2015

Beijing, P.R.China

Seoul

OMEG2017

Daejeon, Korea

OMEG2017

venue

Hotel ICC

Please visit: http://www.daejeon.go.kr/dre/index.do

How attractive Daejeon is ?

“Modern Science City”

Many Art Activities

Wonderful Food

Beautiful Landscape

・・・

Important Dates

Registration opening day: 09 February 2017 Registration deadline: 31 March 2017

Local Organization Committee K. Chae (Sungkyungkwan U.) K. Cho (KISTI) C. H. Hyun (Daegu U.) S. C. Kim (KASI) Y. Kim (RISP/IBS) K. Kwak (UNIST) Y. K. Kwon (RISP/IBS) C. -H. Lee (Pusan Nat’ U.) S. C. Yang (KASI)

Contact info: omeg2017@ibs.re.kr