Isospin splitting of nucleon effective mass and isospin effect in heavy-ion collisions

Zhaoqing FENG

doi:10.13538/j.1001-8042/nst.2013.05.004

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Isospin splitting of nucleon effective mass and isospin effect in heavy-ion collisions

Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reactions (IWND 2012) | Updated：2021-01-20

- Isospin splitting of nucleon effective mass and isospin effect in heavy-ion collisions
- Nuclear Science and Techniques Vol. 24, Issue 5, Article number: 050504(2013)
- Affiliations：
  
  1.Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- Author bio：
  
  Corresponding author. E-mail address:fengzhq@impcas.ac.cn
- Funds：
- DOI：10.13538/j.1001-8042/nst.2013.05.004
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Zhaoqing FENG. Isospin splitting of nucleon effective mass and isospin effect in heavy-ion collisions. [J]. Nuclear Science and Techniques 24(5):050504(2013)
DOI：

Zhaoqing FENG. Isospin splitting of nucleon effective mass and isospin effect in heavy-ion collisions. [J]. Nuclear Science and Techniques 24(5):050504(2013) DOI： 10.13538/j.1001-8042/nst.2013.05.004.

摘要

Abstract

Two different isospin splittings of nucleon effective mass in nuclear medium as the form of , $m_{n}^{*} > m_{p}^{*}$ , and , $m_{n}^{*} < m_{p}^{*}$ , have been implemented in an isospin and momentum dependent transport model. Their impacts on the isospin emission in heavy-ion collisions is investigated thoroughly. It is found that the yield ratios of energetic neutrons to protons squeezed out during the compression stage of two colliding nuclides are sensitive to the isospin splitting. The elliptic flows of free nucleons are also to be promising observables for extracting the nucleon effective mass splitting. Further experimental measurements are being expected, in particular at the CSR-CEE platform in Lanzhou. Several observables are proposed for constraining the density dependence of symmetry energy, such as the transverse flow difference of neutrons and protons, double ratios of ,n,/,p, and ,π,−,/,π,+, excitation functions of ,π,−,/,π,+, and ,K,0,/,K,+,.

关键词

Keywords

Isospin splittingNucleon effective massCollective flowsSymmetry energy

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Related Institution

Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou

CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences

Key Laboratory of Beam Technology of Ministry of Education, Institute of Radiation Technology, Beijing Academy of Science and Technology

Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University

Guangxi Key Laboratory of Nuclear Physics and Technology, Guangxi Normal University

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