Secondary decay effects of the isospin fractionation in the projectile fragmentation at GeV/nucleon

• 作者: Chen-Chen Guo Jun Su Long Zhu
• 来源期刊: 核技术（英文版）
• 年，卷（期）: 2020,（12）
• 所属期刊栏目: NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH
• 页码范围: 122-128
• 页数: 7页
• 语种: 英文

摘要

The isospin fractionations in 124Sn, 107Sn +120Sn at 600 MeV/nucleon, and 136Xe, 124Xe + 208Pb at 1000 MeV/nucleon are investigated by the isospin-depen-dent quantum molecular dynamics model coupled with the statistical code GEMINI. The yield ratio as a function of the binding energy difference for light mirror nuclei 3H/3He, 7Li/7Be, 11B/11C, and 15N/15O is applied to estimate the ratio between neutrons and protons in the gas of the fragmenting system. By comparing the estimated values resulting from the simulations with and without the GEMINI code, it was found that the secondary decay dis-torts the signal of the isospin fractionation. To minimize the secondary decay effects, the yield ratio of the light mirror nuclei 3H/3He as well as its double ratio between two systems with different isospin asymmetries of the projectiles is recommended as robust isospin observables.