改进的QMD模型研究不同入射道条件对同位旋分馏强度的影响  

Influence of incidence channel condition on isospin fractionation ratio based on the revised isospin-dependent quantum molecular dynamics

作　　者：郭文军[1] 孙长安[1] 刘建业[2,3] 

机构地区：[1]上海理工大学理学院,上海200093 [2]中国科学院近代物理研究所,兰州730000 [3]兰州重离子加速器国家实验室原子核理论中心,兰州730000

出　　处：《物理学报》2009年第2期871-875,共5页Acta Physica Sinica

基　　金：国家自然科学基金重点项目(批准号:10435080);国家自然科学基金(批准号:10447006;10575075);上海高校选拔培养优秀青年教师科研专项基金;上海市教育委员会科研创新项目(批准号:09YZ207)资助的课题~~

摘　　要：通过在同位旋相关量子分子动力学模型(IQMD)中引入同位旋依赖的动量相关作用和同位旋相关的Skyrme势,得到了改进的同位旋依赖的量子分子动力学模型,并用此模型分析和讨论了中能重离子碰撞中的同位旋分馏强度随入射道条件的演化.结果表明在中能重离子碰撞中各种入射道条件下同位旋依赖的动量相关作用和Skyrme势有着明显的同位旋效应,它们减弱了同位旋分馏的过程.Isospin degree of freedom is introduced in Skyrme potential and momentum dependent interaction to obtain the revised isospin dependent quantum molecular dynamics. The isospin effect of isospin fractionation ratio is studied for different beam energies and different colliding systems based on the revised isospin dependent quantum molecular dynamics. It is found that the isospin effect of isospin fractionation ratios is important for different incident channel conditions,for example,the isospin fractionation ratios for different incident channel conditions are reduced after the isospin degree of freedom in Skyrme potential and momentum dependent interaction are included. However, the isospin fractionation ratio is also sensitive to symmetry potential. In this case it is also a good probe for extracting information on the symmetry potential in heavy ion collisions.

关 键 词：同位旋分馏 同位旋相关的动量相关作用 同位旋相关的Skyrme势 

分 类 号：O571.2[理学—粒子物理与原子核物理]