| Isospin Momentum-Dependent Interaction and Its Role on the Isospin Fractionation Ratio in Intermediate Energy Heavy Ion Collisions |
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| 作者姓名： | 刘建业 郭文军 邢永忠 李希国 |
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| 作者单位： | [1]InstituteofModernPhysics,ChineseAcademyofSciences,POBox31,Lanzhou730000 [2]CentreofTheoreticalNuclearPhysics,NationalLaboratoryofHeavyIonAccelerator,Lanzhou730000／／DepartmentofPhysics,TianshuiNormalCollege,Tianshui741000 [3]CentreofTheoreticalNuclearPhysics,NationalLaboratoryofHeavyIonAccelerator,Lanzhou730000／／InstituteofModernPhysics,ChineseAcademyofSciences,POBox31,Lanzhou730000 |
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| 摘 要： | We investigate the role of isospin momentum-dependent interaction on the isospin fractionation ratio and its dynamical mechanism in the intermediate energy heavy ion collisions, by inserting an isospin degree of freedom into the momentum-dependent interaction to obtain an isospin momentum-dependent interaction given in a form practically usable in the isospin-dependent quantum molecular dynamics model. It is found that the isospin momentum-dependent interaction brings an important isospin effect into the isospin fractionation ratio. In particular, the isospin momentum-dependent interaction reduces obviously the reduction of isospin fractionation ratio. Thus the isospin dependence of momentum-dependent interaction is thus important for studying accurately the equation of state of isospin asymmetry nuclear matter.
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| 关 键 词： | 同位旋 动量依赖性 分馏率 居间能量 重离子碰撞 |
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