Influence of Isospin Dependence of In-Medium NN Cross Sections on Emitted Neutron to Proton Ratio in HICs  

作　　者：JIA Yi-jian,ZHANG Ying-xun,LI Zhu-xia,LU Xiao-hua,WU Xi-zhen,ZHAO Kai 

出　　处：《Annual Report of China Institute of Atomic Energy》2009年第1期152-153,共2页中国原子能科学研究院年报（英文版）

基　　金：Supported by National Natural Science Foundation of China(10675172,10675077,10875031);Major State Basic Research Development Program (2007CB209900)

摘　　要：The equation of state for isospin asymmetry nuclear matter is related to many areas,such as nuclear structure and reactions for isospin asymmetry nuclei and the properties and the evolution of neutron stars.The equation of state for isospin asymmetry nuclear matter is related to many areas, such as nuclear structure and reactions for isospin asymmetry nuclei and the properties and the evolution of neutron stars. But the behavior of the density dependence of the asymmetry nuclear equation of state is poorly known. So, constraining the density dependence of the isospin asymmetry nuclear equation of state becomes a hot topic in heavy ion collisions and stimulates lot of theorists and experimentalists to explore it. However, the contributions from nucleon-nucleon collisions are as important as that from the mean field contributions at intermediate-high energy heavy ion collisions in the transport model approaches. The employed cross sections affect virtually any observable in heavy ion collisions and constraining those cross sections is essential for reducing the EoS uncertainties.

关 键 词：中子截面 同位旋 神经网络 依赖性 重离子碰撞 质子 发射 对中 

分 类 号：O571.55[理学—粒子物理与原子核物理] O572[理学—物理]