Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2019, Vol. 30 ›› Issue (1): 15 doi: 10.1007/s41365-018-0534-6


Yield ratios and directed flows of light particles from proton-rich nuclei-induced collisions

Ting-Zhi Yan1• Shan Li1 • Yan-Nan Wang1 • Fei Xie1 • Ting-Feng Yan2   

  1. 1 School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, China
    2 State Grid Tancheng Power Supply Company, Linyi 276100, China
  • Received:2018-03-01 Revised:2018-09-24 Accepted:2018-10-01
  • Contact: Ting-Zhi Yan
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (No. 11405025).
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Ting-Zhi Yan, Shan Li, Yan-Nan Wang, Fei Xie, Ting-Feng Yan. Yield ratios and directed flows of light particles from proton-rich nuclei-induced collisions.Nuclear Science and Techniques, 2019, 30(1): 15     doi: 10.1007/s41365-018-0534-6

Abstract: The neutron-to-proton and 3H-to-3He yield ratios, and the directed flows of particles dependent on a reduced rapidity, the transverse momentum per nucleon, and a reduced impact parameter are investigated for 28S + 28Si and 32S + 28Si systems at 50 and 400 MeV/u using an isospin-dependent quantum molecular dynamics model. The results show that these yield ratios of projectile-like fragments are approximately equal to the constituent neutron- to-proton ratio of the projectile. There are clear differences of the directed flows for isospin-related fragments neutron and proton, 3H and 3He from 28S + 28Si collisions. The differences in directed flows for neutrons and protons and 3H–3He from a proton-rich nucleus 28S- induced collisions are noticeably larger than those from a stable nucleus 32S- induced reactions under medium impact parameters. Thus, the yield ratios and differences in directed flows for the neutrons and protons and 3H–3He under medium impact parameters are proposed as possible observable items for studying isospin physics.

Key words: Yield ratio, Directed flow, Proton-rich nucleus