Isospin Effects on Fragmentation Process and Role of Momentum Dependent Interaction in Heavy Ion Collisions at Intermediate Energy

  • The isospin effects on the fragmentation process and the role of momentum dependent interaction in heavy ion collisions at intermediate energy are studied systematically by using isospin dependent Quantum Molecular Dynamical model (IQMD). The results show that multiplicity of intermediate mass fragments imf>b averaged over all impact parameters depends on the isospin effects of in-medium nucleon-nucleon cross section strongly but on the symmetry potential weakly. The momentum dependent interaction enhances the sensitivity of Nimf to the isospin effects of in-medium nucleon-nucleon cross section. Therefore, imf>b can be used as a probe to extract the information of in-medium isospin-dependent nucleon-nucleon cross section in heavy ion collisions at intermediate energy.
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XING Yong-Zhong, LIU Jian-Ye, GUO Wen-Jun, ZUO Wei, DI Yu-Fang, LI Xi-Guo and LI Zeng-Hua. Isospin Effects on Fragmentation Process and Role of Momentum Dependent Interaction in Heavy Ion Collisions at Intermediate Energy[J]. Chinese Physics C, 2003, 27(2): 130-134.
XING Yong-Zhong, LIU Jian-Ye, GUO Wen-Jun, ZUO Wei, DI Yu-Fang, LI Xi-Guo and LI Zeng-Hua. Isospin Effects on Fragmentation Process and Role of Momentum Dependent Interaction in Heavy Ion Collisions at Intermediate Energy[J]. Chinese Physics C, 2003, 27(2): 130-134. shu
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Received: 2002-03-06
Revised: 1900-01-01
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Isospin Effects on Fragmentation Process and Role of Momentum Dependent Interaction in Heavy Ion Collisions at Intermediate Energy

    Corresponding author: XING Yong-Zhong,
  • Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China2 Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China3 Department of Physics, Tianshui Normal College, Gansu Tianshui 741000, China4 Lanzhou Branch of Chinese Academy of Sciences, Lanzhou 730000, China

Abstract: The isospin effects on the fragmentation process and the role of momentum dependent interaction in heavy ion collisions at intermediate energy are studied systematically by using isospin dependent Quantum Molecular Dynamical model (IQMD). The results show that multiplicity of intermediate mass fragments imf>b averaged over all impact parameters depends on the isospin effects of in-medium nucleon-nucleon cross section strongly but on the symmetry potential weakly. The momentum dependent interaction enhances the sensitivity of Nimf to the isospin effects of in-medium nucleon-nucleon cross section. Therefore, imf>b can be used as a probe to extract the information of in-medium isospin-dependent nucleon-nucleon cross section in heavy ion collisions at intermediate energy.

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