Dependence of Isospin Fractionation on Beam Energy in Heavy Ion Collisions at Intermediate Energies

• 作者: GuoWenjun LiuJianye XingYongzhong LiuHang
• 来源期刊: 近代物理研究所和兰州重离子加速器实验室年报：英文版
• 学科: 物理学
• 关键词: 同位旋分馏法 重离子碰撞 居间能量 核子喷射
• 年，卷（期）: 2003,（1）
• 页码范围: 10
• 页数: 1页
• 分类号: O571.6

摘要

We investigated the dependence of isospin fractionation degree (N/Z)n/ (N/Z)Nfrag on the beam energy by using the isospin dependent quantum molecular dynamics model (IQMD). The (N/Z)n and (N/Z)Nfrag are the neutron proton ratio of nucleon emission (gas phase) and that of fragment emission (liquid phase) respectively. The calculated results show that (N/Z)n / (N/Z)Nfrag enhances with increasing the beam energy due to the increase of excitation energy of colliding system. But above properties is only occurred in the definiteenergy region.