| 重离子碰撞中的对称势翻转 |
| |
| 引用本文： | 雍高产,李宝安,陈列文,左维. 重离子碰撞中的对称势翻转[J]. 物理学报, 2006, 55(10): 5166-5171 |
| |
| 作者姓名： | 雍高产 李宝安 陈列文 左维 |
| |
| 作者单位： | (1)Department of Chemistry and Physics,P.O.Box 419,Arkansas State University,Arkansas 72467-0419,USA; (2)上海交通大学理论物理研究所，上海 200240; (3)中国科学院近代物理研究所，兰州 730000; (4)中国科学院近代物理研究所，兰州 730000;中国科学院研究生院，北京 100049 |
| |
| 基金项目： | 中国科学院知识创新工程项目;国家重点基础研究发展计划(973计划);国家自然科学基金;科技部科技专项基金;美国国家科学基金 |
| |
| 摘 要： | 利用同位旋和动量相关的输运模型IBUU，以Sn,Sn同位素在低能与高能碰撞为例，在两种不同的对称势作用下，研究了重离子碰撞中的对称势翻转现象.我们发现从低能到高能在同位旋相分化、发射核子的中-质比、发射核子的双n/p比，中-质微分横向流观测量中均存在对称势翻转现象.对称势翻转效应的研究有利于确定对称能的密度依赖性.关键词：重离子碰撞对称势翻转对称能
|
| 关 键 词： | 重离子碰撞 对称势翻转 对称能 |
| 收稿时间： | 2005-11-23 |
| 修稿时间： | 2005-11-232005-12-07 |
Flipped symmetry potential in heavy-ion collisions |
| |
| Yong Gao-Chan,Li Bao-An,Chen Lie-Wen,Zuo Wei. Flipped symmetry potential in heavy-ion collisions[J]. Acta Physica Sinica, 2006, 55(10): 5166-5171 |
| |
| Authors: | Yong Gao-Chan Li Bao-An Chen Lie-Wen Zuo Wei |
| |
| Affiliation: | 1. Institute of Modern Physics , Chinese Academy of Sciences , Lanzhou 730000, China; 2 Graduate School, Chinese Academy of Sciences, Beijing 100049, China; 3 Department of Chemistry and Physics, P . O . Box 419, Arkansas State University, Arkansas 72467-0419, USA; 4 Institute of Theoretical Physics, Shanghai Jiao Tong University, Shanghai 200240, China |
| |
| Abstract: | Within the IBUU transport model, flipping of the symmetry potential in heavy-ion collisions is studied. It is found that there exist flipping of the symmetry potential in the isospin fractionation, the single neutron to proton ratio, the double neutron to proton ratio and the neutron-proton differential flow from lower to higher incident energies. The flipping of the symmetry potential results from the change of the relative magnitude of the hard and soft symmetry energies at lower and higher densities. Future observations of the flipped symmetry potential in experiment will help the study of the density-dependent symmetry energy. |
| |
| Keywords: | heavy-ion collisions flipped symmetry potential symmetry energy |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《物理学报》浏览原始摘要信息 |
|
点击此处可从《物理学报》下载免费的PDF全文 |
|
