Isospin effect in multifragmentation process of heavy ion collisions at intermediate energy

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	Isospin effect in multifragmentation process of heavy ion collisions at intermediate energy
	Zhang, FS ; Zhao, Q ; Liu, JY ; Wang, SJ ; Zuo, W ; Chen, LW
刊名	HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
	2000-11-01
卷号	24 期号:11 页码:1024-1029
关键词	isospin effect multiplicities of intermediate-mass fragments nucleon-nucleon cross section
ISSN号	0254-3052
英文摘要	From the simulation of intermediate energy heavy ion collisions by using the isospin dependent quantum molecular dynamics (IQMD), we have investigated the isospin effects on the multifragmentation process in intermediate energy heavy ion collisions: reverse reactions Xe-120 + Ca-40, Cd-120+ Ar-40, Kr-76+ Ca-40 and Zn-76+ Ar-40. To describe isospin effects appropriately, QMD was modified properly. The density dependent mean field contains correct isospin term including symmetry energy and Coulomb potential. The in-medium n-n cross section is different for neuron-neutron (proton-proton) and neutron-proton collisions. And finally Pauli blocking was counted by distinguishing neutrons and protons. In addition, the initial condition of the ground state of two colliding nuclei also contains isospin information. The calculated results show a prominent isospin effects for the multifragmentation process among the colliding systems with different neutron or proton excess. The correlation between N-imf and N-c for neutron-deficient systems are always larger than those for neutron-rich systems in intermediate energy region for all of colliding systems studied here, and the mechanism causing the above isospin effects is mainly due to the fact that the mean n-n cross section for the neutron-rich system is smaller than that of neutron-deficient system. Thus one can combine experimental studies and theoretical simulations to investigate the isospin effect of multifragmentation process and to extract the information on isospin dependence of in-medium n-n cross section from the correlation between N-imf and N-c.
WOS关键词	FRAGMENT FORMATION ; FLOW ; EQUATION ; MODEL ; STATE
WOS研究方向	Physics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000165310900008
公开日期	2010-10-29
内容类型	期刊论文
源URL	[http://ir.imp.cas.cn/handle/113462/1399]
专题	近代物理研究所_近代物理研究所知识存储（2010之前）
通讯作者	Zhao, Q
作者单位	1.SW Jiaotong Univ, Inst Modern Phys, Chengdu 610031, Peoples R China 2.Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhang, FS,Zhao, Q,Liu, JY,et al. Isospin effect in multifragmentation process of heavy ion collisions at intermediate energy[J]. HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,2000,24(11):1024-1029.
APA	Zhang, FS,Zhao, Q,Liu, JY,Wang, SJ,Zuo, W,&Chen, LW.(2000).Isospin effect in multifragmentation process of heavy ion collisions at intermediate energy.HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,24(11),1024-1029.
MLA	Zhang, FS,et al."Isospin effect in multifragmentation process of heavy ion collisions at intermediate energy".HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION 24.11(2000):1024-1029.