Probing neutron-proton effective mass splitting using nuclear stopping and isospin mix in heavy-ion collisions in GeV energy region

Fan Zhang; Jun Su

doi:10.1007/s41365-020-00787-6

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Probing neutron-proton effective mass splitting using nuclear stopping and isospin mix in heavy-ion collisions in GeV energy region

NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH | Updated：2021-01-26

- Probing neutron-proton effective mass splitting using nuclear stopping and isospin mix in heavy-ion collisions in GeV energy region
- Nuclear Science and Techniques Vol. 31, Issue 8, Article number: 77(2020)
- Affiliations：
  
  1.Department of Electronic Information and Physics, Changzhi University, Changzhi 046011, China
  2.Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
- Author bio：
  
  Corresponding author, zhangfan@mail.bnu.edu.cn
- Funds：
- DOI：10.1007/s41365-020-00787-6
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Fan Zhang, Jun Su. Probing neutron-proton effective mass splitting using nuclear stopping and isospin mix in heavy-ion collisions in GeV energy region. [J]. Nuclear Science and Techniques 31(8):77(2020)
DOI：

Fan Zhang, Jun Su. Probing neutron-proton effective mass splitting using nuclear stopping and isospin mix in heavy-ion collisions in GeV energy region. [J]. Nuclear Science and Techniques 31(8):77(2020) DOI： 10.1007/s41365-020-00787-6.

摘要

Abstract

The ramifications of the effective mass splitting on the nuclear stopping and isospin tracer during heavy-ion collisions within the gigaelectron volt energy region are studied using an isospin-dependent quantum molecular dynamics model. Three isotope probes, i.e., a proton, deuteron, and triton, are used to calculate the nuclear stopping. Compared to the, $m_{n}^{*} > m_{p}^{*}$ , case, the , $m_{n}^{*} < m_{p}^{*}$ , parameter results in a stronger stopping for protons but a weaker stopping for tritons. The calculations of the isospin tracer show that the , $m_{n}^{*} > m_{p}^{*}$ , parameter results in a higher isospin mix than the , $m_{n}^{*} < m_{p}^{*}$ , parameter. The rapidity and impact parameter dependences of the isospin tracer are also studied. A constraining of the effective mass splitting using the free nucleons with high rapidity and in a central rather than peripheral collision is suggested.

关键词

Keywords

Neutron-proton effective mass splittingNuclear stoppingIsospin mix

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School of Nuclear Science and Technology, Lanzhou University

School of Science, Huzhou University

Institute of Modern Physics, Chinese Academy of Sciences

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