| 核物质状态方程中动量相关作用可能的探针 |
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| 引用本文： | 刘建业,郭文军.核物质状态方程中动量相关作用可能的探针[J].物理学报,2010,59(10):6933-6939. |
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| 作者姓名： | 刘建业 郭文军 |
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| 作者单位： | 1. 天水师范学院物理系,天水,741000;中国科学院近代物理研究所,兰州,730000;重离子加速器国家实验室原子核理论中心,兰州,730000
2. 上海理工大学理学院,上海,200093 |
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| 基金项目： | 国家自然科学基金重点项目(批准号:10435080)、国家自然科学基金面上项目(批准号:10575075)和中国科学院知识创新工程重要方向项目(批准号:KJCXZ-SW-N02)资助的课题. |
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| 摘 要： | 研究了动量相关作用对于中子-质子比动能谱rb(Ek)的效应,发现rb(Ek)灵敏的依赖于动量相关作用而弱的依赖于介质中核子-核子碰撞截面和对称势.因此rb(Ek)是提取重离子碰撞中动量相关作用信息的可能探针.同时,对于丰中子弹核和相同质量稳定弹核在相同入射道条件下,丰中子碰撞系统明显加强了动量相关作用对rb(Ek)的效应.故两个碰撞系统rb(Ek)结果的比较为在重离子碰撞中提取动量相关作用的知识提供了另一个重要的判据。
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| 关 键 词： | 核子-核子碰撞截面 对称势 动量相关作用 |
| 收稿时间： | 2009-08-14 |
Possible probe on the momentum dependent interaction in the equation of state of nuclear matter |
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| Liu Jian-Ye,Guo Wen-Jun.Possible probe on the momentum dependent interaction in the equation of state of nuclear matter[J].Acta Physica Sinica,2010,59(10):6933-6939. |
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| Authors: | Liu Jian-Ye Guo Wen-Jun |
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| Institution: | Physics Department of Tianshui Normal University, Tianshui 741000, China; Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,;Science College University of Shanghai for Science and Technology, Shanghai 200093, China |
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| Abstract: | The effects of momentum dependent interaction on the kinetic energy spectrum of the neutron-proton ratiorb(Ek)in the equation of state of nuclear matter was investigated.We found that the kinetic energy spectrum of the neutron-proton ratio rb(Ek) depends sensitively on the momentum dependent interaction and weakly on the in-medium nucleon-nucleon cross section and symmetry potential so that the rb(Ek) is a sensitive physical probe for extracting the information of momentum dependent interaction in the heavy ion collisions. At the same time, the comparing investigate between rb(Ek) for the neutron-rich collision system and the same mass stable collision system gives a important judgment for extracting the information of momentum dependent interaction in the heavy ion collisions. |
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| Keywords: | nucleon-nucleon collision cross section symmetry potential momentum dependent interaction |
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