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  • Letter

Kinetic approach of light-nuclei production in intermediate-energy heavy-ion collisions

Rui Wang1,2,*, Yu-Gang Ma1,3,†, Lie-Wen Chen4,‡, Che Ming Ko5,§, Kai-Jia Sun1,3,∥, and Zhen Zhang6,¶

  • 1Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), and Institute of Modern Physics, Fudan University, Shanghai 200433, China
  • 2Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • 3Shanghai Research Center for Theoretical Nuclear Physics (NSFC), Fudan University, Shanghai 200438, China
  • 4School of Physics and Astronomy, Shanghai Key Laboratory for Particle Physics and Cosmology, and Key Laboratory for Particle Astrophysics and Cosmology (MOE), Shanghai Jiao Tong University, Shanghai 200240, China
  • 5Cyclotron Institute and Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA
  • 6Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China

  • *wangrui@sinap.ac.cn
  • †mayugang@fudan.edu.cn
  • ‡lwchen@sjtu.edu.cn
  • §ko@comp.tamu.edu
  • ∥kjsun@tamu.edu
  • zhangzh275@mail.sysu.edu.cn
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Phys. Rev. C 108, L031601 – Published 22 September, 2023

DOI: https://doi.org/10.1103/PhysRevC.108.L031601

Abstract

We develop a kinetic approach to the production of light nuclei up to mass number A⩽4 in intermediate-energy heavy-ion collisions by including them as dynamic degrees of freedom. The conversions between nucleons and light nuclei during the collisions are incorporated dynamically via the breakup of light nuclei by a nucleon and their reverse reactions. We also include the Mott effect on light nuclei; i.e., a light nucleus will no longer be bound if the phase-space density of its surrounding nucleons is too large. With this kinetic approach, we obtain a reasonable description of the measured yields of light nuclei in central Au+Au collisions at energies of 0.25AGeV–1.0AGeV by the FOPI Collaboration. Our study also indicates that the observed enhancement of the α-particle yield at low incident energies can be attributed to a weaker Mott effect on the α particle, which makes it more difficult to dissolve in nuclear medium, as a result of its much larger binding energy.

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Phys. Rev. C 108, L031601– Published 22 September, 2023
  • Received 11 February 2023
  • Accepted 29 August 2023
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