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题名: Probing equilibration in HICs and symmetry energy by using isospin-related observables
作者: Li, QF ;  Li, ZX
刊名: HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
出版日期: 2002
卷号: 26, 期号:9, 页码:926-932
关键词: HEAVY-ION COLLISIONS ;  MULTIFRAGMENTATION ;  DYNAMICS ;  NUCLEI ;  MATTER
学科分类: Physics
通讯作者: Li, QF , China Inst Atom Energy, Beijing 102413, Peoples R China.
部门归属: China Inst Atom Energy, Beijing 102413, Peoples R China; Natl Lab Lanzhou Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: We have studied the equilibration with respect to isospin degree of freedom in four systems Ru-96 + Ru-96, Ru-96 + Zr-96, Zr-96 + Ru-96, Zr-96 + Zr-96 at 100 MeV/u and 400MeV/u with isospin dependent QMD. It is proposed in this paper that the neutron-proton differential rapidity distribution is a sensitive probe to the degree of equilibration with respect to the isospin degree of freedom. By analyzing the average N/Z ratio of emitted nucleons, light charged particles (LCP) and intermediate mass fragments (IMF), it is found that there exists memory effect in multifragmentation process. The average N/Z ratio of IMF reduces largely as beam energy increases from 100MeV/u to 400MeV/u, which may result from the change of the behavior of the isotope distribution of IMF. The isotope distribution of IMF does also show certain memory effect at 100 MeV/u case but not at 400 MeV/u case. We also found the rapidity distribution of differential neutron-proton counting in neutron rich nucleus-nucleus collisions at intermediate energies is sensitive to the isospin dependent pail of nuclear potential. In conclusion, based on these studies we have found it's an effective way to explore whether the final equilibration could be reached in intermediate HICs by constructing a set of isospin (a)symmetry nuclear-nuclear collision systems with same mass and different charge.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000178047200008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13445
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Li, QF,Li, ZX. Probing equilibration in HICs and symmetry energy by using isospin-related observables[J]. HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,2002,26(9):926-932.
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