摘要
基于重质量弹核（放射性核或稳定核）打轻质量靶核的逆运动学效应，即 反应产物主要集中在小角度的优点，利用同位旋相关的量子分子动力学模型，探 寻了对于中能重离子碰撞过程中同位旋效应灵敏的物理观测量．计算表明，在 入射能量约大于８０ＭｅＶ／ｕ能区，中等质量碎片多重性随发射带电粒子总数之间 的演化是提取介质中同位旋相关的核子－核子碰撞截面的灵敏物理量．
Based on the light charged particles and fragments emitted towards forward angles by using the heavy projectile on the light target, we have made use of isospin-dependent quantum molecular dynamics to investigate a sensitive probe on the isospin effects in the process of intermediate energy heavy ion collision. The calculation results show that the correlation between the multiplicity of intermediate mass fragments and the total number of charged par- ticles in the energy region above 80MeV/u is a sensitive probe on the isospin-dependent nu- cleon-nucleon cross section in medium in intermediate energy heavy ion collision, meanwhile the isospin effects of symmetric energy is not obvious in the same energy region.
出处
《高能物理与核物理》
EI
CSCD
北大核心
2000年第4期326-330,共5页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金!(19775057)
国家自然科学理论物理专项!(19847002)
中国科学院九五基础性研究重大项目!(K
关键词
同位旋效应
重离子碰撞
探针
isospin effects, heavy ion collision, sensitive probe
