| 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 |
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| 引用本文： | 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. |
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| 作者姓名： | 吴强华 张英逊 肖志刚 王仁仲 张嫣 李祝霞 王宁 |
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| 作者单位： | 1.中国原子能科学研究院核物理研究所, 北京 102413; |
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| 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） |
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| 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（Ebeam=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 Ek>10 MeV.
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| 关 键 词： | 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 |
| 收稿时间： | 2016-01-14 |
Relation Between the Angular Anisotropy of Coalescence Invariant Neutron to Proton Ratio and the Symmetry Energy in Asymmetric Heavy Ion Collisions |
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| 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. |
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| Authors: | WU Qianghua ZHANG Yingxun XIAO Zhigang WANG Rensheng ZHANG Yan LI Zhuxia WANG Ning |
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| Institution: | 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 |
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| 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 Ek>10 MeV. |
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| Keywords: | symmetry energy heavy ion collision anisotropy of angular distribution coalescence invariant yield asymmetry reaction system |
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