中能重离子碰撞中的自旋动力学研究

项目名称： 中能重离子碰撞中的自旋动力学研究

项目编号： No.11475243

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 徐骏

作者单位： 中国科学院上海应用物理研究所

项目金额： 86万元

中文摘要： 理解核力的性质是核物理的基本问题之一。核子间的自旋轨道相互作用和张量力是核力的重要组成部分，两者在核结构领域被广泛研究，但长期以来它们在重离子碰撞中的效应一直被忽视了。我们将在IBUU输运模型中引入核子的自旋自由度，以及自旋轨道相互作用和张量力引起的自旋相关势，研究中能重离子碰撞的自旋动力学。不同自旋的核子受到不同的势的作用，末态观测量将发生自旋劈裂，与同位旋效应类似。将模拟结果与将来实验数据作比较，有望利用中能重离子碰撞获取自旋轨道相互作用和张量力的进一步信息。

中文关键词： 重离子碰撞；输运模型；自旋-轨道相互作用；张量力；极化

英文摘要： Understanding the properties of nuclear force is the most fundamental problems in nuclear physics. The spin-orbit interaction and tensor force between nucleons are important components of nuclear force, and both of them have been extensively studied in the research field of nuclear structure, while their effects in heavy-ion collisions have long been overlooked. We are going to introduce spin degree of freedom for nucleons and spin-related potentials induced by the spin-orbit interaction as well as the tensor force into the IBUU transport model, and study the spin dynamics in intermediate-energy heavy-ion collisions. Since nucleons with different spins are affected by different potentials, spin splitting is expected to appear in final observables, similar to the isospin effects. By comparing the results from transport model simulations to the experimental data in the future, further information of the spin-orbit interaction and the tensor force can hopefully be extracted using intermediate-energy heavy-ion collisions.

英文关键词： heavy-ion collisions;transport model;spin-orbit interaction;tensor force;polarization