Probing neutron-proton effective mass splitting using nuclear stopping and isospin mix in heavy-ion collisions in GeV energy region
Probing neutron-proton effective mass splitting using nuclear stopping and isospin mix in heavy-ion collisions in GeV energy region
复制标题
利用核停止和同位旋混合在 GeV 能区重离子碰撞中探测中子-质子有效质量分裂
DOI：
10.1007/s41365-020-00787-6
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发表时间：
2020
影响因子：
2.8
通讯作者：
Su Jun
中科院分区：
文献类型：
--
作者：
Zhang Fan;Su Jun
利用同位旋相关的量子分子动力学模型，研究了重离子碰撞过程中有效质量分裂对核阻止和同位旋示踪的影响.三种同位素探针，即，质子、氘核和triton用于计算核阻止。与情况相比，该参数对质子的阻止作用较强，而对氚的阻止作用较弱。对同位旋示踪剂的计算表明，该参数比该参数导致更高的同位旋混合。还研究了同位旋示踪剂的快度和碰撞参数的依赖性。本文提出了一种用高快度的自由核子来限制有效质量分裂的方法。
The ramifications of the effective mass splitting on the nuclear stopping and isospin tracer during heavy-ion collisions within the gigaelectron volt energy region are studied using an isospin-dependent quantum molecular dynamics model. Three isotope probes, i.e., a proton, deuteron, and triton, are used to calculate the nuclear stopping. Compared to thecase, theparameter results in a stronger stopping for protons but a weaker stopping for tritons. The calculations of the isospin tracer show that theparameter results in a higher isospin mix than theparameter. The rapidity and impact parameter dependences of the isospin tracer are also studied. A constraining of the effective mass splitting using the free nucleons with high rapidity and in a central rather than peripheral collision is suggested.