Dependence of Isoscaling Parameters on Nucleon--Nucleon Cross Section and Momentum-Dependent Interaction
XING Yong-Zhong 1,3, HAO Huan-Feng2, LIU Xiao-Bin1, FANG Yu-Tian1, LIU Bao-Yi1
1Department of Physics, Tianshui Normal University, Tianshui 7410002Institute of Modern Physics, Chinese Academy of Sciences, PO Box 31, Lanzhou 7300003The Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000
Dependence of Isoscaling Parameters on Nucleon--Nucleon Cross Section and Momentum-Dependent Interaction
1Department of Physics, Tianshui Normal University, Tianshui 7410002Institute of Modern Physics, Chinese Academy of Sciences, PO Box 31, Lanzhou 7300003The Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000
摘要Influences of the isospin dependence of the in-medium nucleon--nucleon cross section and the momentum-dependent interaction (MDI) on the isotope scaling are investigated by using the isospin-dependent quantum molecular dynamics model (IQMD). The results show that both the isospin dependence of the in-medium nucleon--nucleon cross section and the momentum-dependent interaction affect the isoscaling parameters appreciably and independently. The influence caused by the isospin dependence of two-body collision is relatively larger than that from the MDI in the mean field. Aiming at exploring the implication of isoscaling behaviour, which the statistical equilibrium in the reaction is reached, the statistical properties in the mass distribution and the kinetic energy distribution of the fragments simulated by IQMD are presented.
Abstract：Influences of the isospin dependence of the in-medium nucleon--nucleon cross section and the momentum-dependent interaction (MDI) on the isotope scaling are investigated by using the isospin-dependent quantum molecular dynamics model (IQMD). The results show that both the isospin dependence of the in-medium nucleon--nucleon cross section and the momentum-dependent interaction affect the isoscaling parameters appreciably and independently. The influence caused by the isospin dependence of two-body collision is relatively larger than that from the MDI in the mean field. Aiming at exploring the implication of isoscaling behaviour, which the statistical equilibrium in the reaction is reached, the statistical properties in the mass distribution and the kinetic energy distribution of the fragments simulated by IQMD are presented.
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2007, Vol. 24 
