Effect of System Mass on Isospin Fractionation in Heavy Ion Collisions at Intermediate Energies

• 作者: LiuJianye XingYongzhong LiuHang GuoWenjun
• 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 聚合效应 重离子碰撞 居间能量 核子发射
• 年，卷（期）: 2003,（1）
• 页码范围: 9
• 页数: 1页
• 分类号: O571.6

摘要

Based on the isospin dependent quantum molecular dynamics model(IQMD) we investigated the dependence of isospin fractionation degree (N/Z)n / (N/Z)Nfrag on the mass of system. 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. We found that the isospin fractionation degree is a scnsitive function of system mass. The (N/Z)n/ (N/Z)Nfrag, reduces with increasing the mass of colliding system when neutron proton ratio of colliding system is fixed.