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

WU Qianghua; ZHANG Yingxun; XIAO Zhigang; WANG Rensheng; ZHANG Yan; LI Zhuxia; WANG Ning

doi:10.11804/NuclPhysRev.33.03.251

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.

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

Key words:

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.

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

doi: 10.11804/NuclPhysRev.33.03.251

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