Probing the density dependence of the symmetry energy with central heavy ion collisions

Wenjie XIE; Fengshou ZHANG

doi:10.13538/j.1001-8042/nst.2013.05.002

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Probing the density dependence of the symmetry energy with central heavy ion collisions

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

- Probing the density dependence of the symmetry energy with central heavy ion collisions
- Nuclear Science and Techniques Vol. 24, Issue 5, Article number: 050502(2013)
- Affiliations：
  
  1.The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China
  2.Beijing Radiation Center, Beijing 100875, China
  3.Department of Physics, Yuncheng University, Yuncheng 044000, China
  4.Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China
- Author bio：
  
  Corresponding author. E-mail address: fszhang@bnu.edu.cn
- Funds：
- DOI：10.13538/j.1001-8042/nst.2013.05.002
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Wenjie XIE, Fengshou ZHANG. Probing the density dependence of the symmetry energy with central heavy ion collisions. [J]. Nuclear Science and Techniques 24(5):050502(2013)
DOI：

Wenjie XIE, Fengshou ZHANG. Probing the density dependence of the symmetry energy with central heavy ion collisions. [J]. Nuclear Science and Techniques 24(5):050502(2013) DOI： 10.13538/j.1001-8042/nst.2013.05.002.

摘要

Abstract

An improved isospin dependent Boltzmann Langevin model, in which the inelastic channels and momentum dependent interactions are incorporated, is used to investigate the high-density behavior of nuclear symmetry energy. By taking several forms of nuclear symmetry energy, we calculate the time evolutions of neutron over proton ratio,π, multiplicity and , $π^{-} / π^{+}$ , ratio, and the kinetic energy and transverse momentum spectra of , $π^{-} / π^{+}$ , ratio in the heavy ion collisions at 400,A, MeV. It is found that the neutron over proton ratio and , $π^{-} / π^{+}$ , ratio are very sensitive to the nuclear symmetry energy, and the ,π,–, is more sensitive to the nuclear symmetry energy than the ,π,+,. A supersoft symmetry energy results in a larger , $π^{-} / π^{+}$ , ratio.

关键词

Keywords

Improved isospin dependent Boltzmann-Langevin modelNuclear symmetry energyNeutron over proton ratioPion production

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