2008•Acta Physica SinicaOpen access
Isospin effect of nucleon-nucleon cross section on the isoscaling parameter α
Liu Jianye, Guo Wen-Jun, Zuo Wei, Xi-Guo Lee, (1)上海理工大学科学学院，上海 200093; (2)天水师范学院数理和信息学院，天水 741000；中国科学院近代物理研究所，兰州 730000；兰州重离子加速器国家实验室原子核理论中心，兰州 730000; (3)中国科学院近代物理研究所，兰州 730000；兰州重离子加速器国家实验室原子核理论中心，兰州 730000
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Abstract
The isospin effects of isoscaling parameter α on the nucleon-nucleon cross section are investigated for two couples of central nuclear reactions 40C+ 40Ca with 60Ca + 40Ca and 112Sn+ 112Sn with 124Sn+ 124Sn within an isospin dependent quantum molecular dynamics. It is found that the isospin effect of isoscaling parameter α on the isospin dependent nucleon-nucleon cross section σmedNN(αm) compared with that on the isospin independent nucleon-nucleon cross sections σ1NN(αm) is very obvious. However, the isospin effect of isoscaling parameter α on σmedNN(αm) compared with that on the isospin independent nucleon-nucleon cross section σ2NN(αm) is small. The mechanisms for the above difference are investigated in detail.