并合不变中子质子产额比值角分布各向异性与对称能关系的研究

吴强华; 张英逊; 肖志刚; 王仁仲; 张嫣; 李祝霞; 王宁

doi:10.11804/NuclPhysRev.33.03.251

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并合不变中子质子产额比值角分布各向异性与对称能关系的研究

吴强华, 张英逊, 肖志刚, 王仁仲, 张嫣, 李祝霞, 王宁

文章导航 > 原子核物理评论 > 2016 > 33(3): 251-257

吴强华, 张英逊, 肖志刚, 王仁仲, 张嫣, 李祝霞, 王宁. 并合不变中子质子产额比值角分布各向异性与对称能关系的研究[J]. 原子核物理评论, 2016, 33(3): 251-257. doi: 10.11804/NuclPhysRev.33.03.251

引用本文:

WU Qianghua, ZHANG Yingxun, XIAO Zhigang, WANG Rensheng, ZHANG Yan, LI Zhuxia, WANG Ning. Relation Between the Angular Anisotropy of Coalescence Invariant Neutron to Proton Ratio and the Symmetry Energy in Asymmetric Heavy Ion Collisions[J]. Nuclear Physics Review, 2016, 33(3): 251-257. doi: 10.11804/NuclPhysRev.33.03.251

Citation:

WU Qianghua, ZHANG Yingxun, XIAO Zhigang, WANG Rensheng, ZHANG Yan, LI Zhuxia, WANG Ning. Relation Between the Angular Anisotropy of Coalescence Invariant Neutron to Proton Ratio and the Symmetry Energy in Asymmetric Heavy Ion Collisions[J]. Nuclear Physics Review, 2016, 33(3): 251-257. doi: 10.11804/NuclPhysRev.33.03.251

并合不变中子质子产额比值角分布各向异性与对称能关系的研究

doi: 10.11804/NuclPhysRev.33.03.251

吴强华^1,2,3,
张英逊^1,,
肖志刚^3,4,
王仁仲³,
张嫣¹,
李祝霞¹,
王宁²

1.
中国原子能科学研究院核物理研究所, 北京 102413;
2.
广西师范大学物理科学与技术学院, 广西桂林 541004;
3.
清华大学物理系, 北京 100084;
4.
量子物质创新研究中心, 北京 100084

基金项目: 国家自然科学基金资助项目（11475262，11275052，11422548，11375062，11375094，11365004）；国家重点基础研究发展计划项目（973计划）（2013CB834404）

详细信息

作者简介:
吴强华(1989-),男,江西上饶人,硕士研究生,从事原子核物理研究;E-mail:qh297239367@126.com

通讯作者: 张英逊,E-mail:zhyx@ciae.ac.cn

Relation Between the Angular Anisotropy of Coalescence Invariant Neutron to Proton Ratio and the Symmetry Energy in Asymmetric Heavy Ion Collisions

1.
China Institute of Atomic Energy, Beijing 102413, China;
2.
Department of Physics and Technology, Guangxi Normal University, Guilin 541004, Guangxi, China;
3.
Department of Physics, Tsinghua University, Beijing 100084, China;
4.
Collaborative Innovation Center of Quantum Matter, Beijing 100084, China

Funds: National Nature Science Foundation of China(11475262, 11275052, 11422548, 11375062, 11375094, 11365004); National Basic Research Program of China (973 Program)(2013CB834404)

摘要: 采用ImQMD05模型分析了非对称反应体系⁴⁰Ar+¹⁹⁷Au，¹²⁴Sn在中低能区（E_beam=35~100 MeV/u）的半擦边反应的条件下的反应机制，并进一步探索了不同模型参数，如对称能斜率、碰撞参数等，对轻粒子并合不变中子质子产额之比角分布各向异性的影响。通过研究发现：对于出射动能大于每核子10 MeV的动力学出射的轻粒子而言，其并合不变的中子质子产额比值角分布各向异性与对称能的软硬具有明显的关联；碰撞参数对轻粒子动力学发射各向异性的影响最弱。

By using the ImQMD05 code,we simulate the ⁴⁰Ar+¹⁹⁷Au,+¹²⁴Sn at beam energy of 35,50 and 100 MeV/u and semi-peripheral collisions.The reaction mechanism,symmetry potential and Coulomb potential competition around the overlapped neck region and impact parameters effects are investigated for understanding the angular distribution of isospin contents of dynamical emitted light particles.Our results show that the angular anisotropy of the coalescence invariant neutron to proton yield ratios is sensitive to the stiffness of symmetry energy,especially for the dynamical emitted light particles with E_k>10 MeV.
- 对称能 /
- 重离子碰撞 /
- 并合不变产额 /
- 角分布的各向异性 /
- 非对称反应体系
Abstract: By using the ImQMD05 code,we simulate the ⁴⁰Ar+¹⁹⁷Au,+¹²⁴Sn at beam energy of 35,50 and 100 MeV/u and semi-peripheral collisions.The reaction mechanism,symmetry potential and Coulomb potential competition around the overlapped neck region and impact parameters effects are investigated for understanding the angular distribution of isospin contents of dynamical emitted light particles.Our results show that the angular anisotropy of the coalescence invariant neutron to proton yield ratios is sensitive to the stiffness of symmetry energy,especially for the dynamical emitted light particles with E_k>10 MeV.
- symmetry energy /
- heavy ion collision /
- anisotropy of angular distribution /
- coalescence invariant yield /
- asymmetry reaction system

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并合不变中子质子产额比值角分布各向异性与对称能关系的研究

doi: 10.11804/NuclPhysRev.33.03.251

1. 中国原子能科学研究院核物理研究所, 北京 102413;

2. 广西师范大学物理科学与技术学院, 广西桂林 541004;

3. 清华大学物理系, 北京 100084;

4. 量子物质创新研究中心, 北京 100084

作者简介:
吴强华(1989-),男,江西上饶人,硕士研究生,从事原子核物理研究;E-mail:qh297239367@126.com

通讯作者: 张英逊,E-mail:zhyx@ciae.ac.cn

收稿日期: 2016-01-14
修回日期: 2016-03-04
刊出日期: 2016-09-20

关键词:

对称能 /

摘要: 采用ImQMD05模型分析了非对称反应体系⁴⁰Ar+¹⁹⁷Au，¹²⁴Sn在中低能区（E_beam=35~100 MeV/u）的半擦边反应的条件下的反应机制，并进一步探索了不同模型参数，如对称能斜率、碰撞参数等，对轻粒子并合不变中子质子产额之比角分布各向异性的影响。通过研究发现：对于出射动能大于每核子10 MeV的动力学出射的轻粒子而言，其并合不变的中子质子产额比值角分布各向异性与对称能的软硬具有明显的关联；碰撞参数对轻粒子动力学发射各向异性的影响最弱。

By using the ImQMD05 code,we simulate the ⁴⁰Ar+¹⁹⁷Au,+¹²⁴Sn at beam energy of 35,50 and 100 MeV/u and semi-peripheral collisions.The reaction mechanism,symmetry potential and Coulomb potential competition around the overlapped neck region and impact parameters effects are investigated for understanding the angular distribution of isospin contents of dynamical emitted light particles.Our results show that the angular anisotropy of the coalescence invariant neutron to proton yield ratios is sensitive to the stiffness of symmetry energy,especially for the dynamical emitted light particles with E_k>10 MeV.

English Abstract

Relation Between the Angular Anisotropy of Coalescence Invariant Neutron to Proton Ratio and the Symmetry Energy in Asymmetric Heavy Ion Collisions

1. China Institute of Atomic Energy, Beijing 102413, China;

2. Department of Physics and Technology, Guangxi Normal University, Guilin 541004, Guangxi, China;

3. Department of Physics, Tsinghua University, Beijing 100084, China;

4. Collaborative Innovation Center of Quantum Matter, Beijing 100084, China

Funds: National Nature Science Foundation of China(11475262, 11275052, 11422548, 11375062, 11375094, 11365004); National Basic Research Program of China (973 Program)(2013CB834404)

Received Date: 2016-01-14
Rev Recd Date: 2016-03-04
Publish Date: 2016-09-20

Keywords:

Abstract: By using the ImQMD05 code,we simulate the ⁴⁰Ar+¹⁹⁷Au,+¹²⁴Sn at beam energy of 35,50 and 100 MeV/u and semi-peripheral collisions.The reaction mechanism,symmetry potential and Coulomb potential competition around the overlapped neck region and impact parameters effects are investigated for understanding the angular distribution of isospin contents of dynamical emitted light particles.Our results show that the angular anisotropy of the coalescence invariant neutron to proton yield ratios is sensitive to the stiffness of symmetry energy,especially for the dynamical emitted light particles with E_k>10 MeV.

引用本文:

Citation:

WU Qianghua, ZHANG Yingxun, XIAO Zhigang, WANG Rensheng, ZHANG Yan, LI Zhuxia, WANG Ning. Relation Between the Angular Anisotropy of Coalescence Invariant Neutron to Proton Ratio and the Symmetry Energy in Asymmetric Heavy Ion Collisions[J]. Nuclear Physics Review, 2016, 33(3): 251-257. doi: 10.11804/NuclPhysRev.33.03.251