论文标题
深入了解电荷平衡以及对多核子转移反应中n = 126左右产生富含中子同位素的影响
Deep insight into charge equilibration and the effects on producing neutron-rich isotopes around N = 126 in the multinucleon transfer reactions
论文作者
论文摘要
电荷平衡的动力学（CE）以及对中子富同位素的产生的影响，在Multinucleon转移反应中，较高的$ n = 126 $ bour尚不清楚。在这封信中，我们通过使用Dinuclear System模型（DNS-SYSU）的扩展版本和改进的量子分子动力学（IMQMD）模型来研究CE的机理。从宏观和显微镜动力学观点来看，即使在非常深的碰撞中，我们也发现了质量不对称反应系统的不完整CE，并且“倒数CE”的行为是，片段的趋势与反应$^{140} $ xe + xe + xe + $ xe + $ xe + xe + xe + $ xe +^{198} $ pt的$ n/z $值远离。与IMQMD模型中显示的慢速过程不同，基于DNS-SYSU模型获得了快速平衡与特征时间$ \ sim $ 0.52 zs的行为，这与实验数据一致。通过执行系统计算，澄清了CE与反应系统的质量不对称之间的相关性，这不仅说明了CE的有趣现象，而且还提供了产生富含中子同位素$ N = 126 $的重要信息。
The dynamics of the charge equilibration (CE) and the effects on the production of the neutron-rich isotopes around $N = 126$ in multinucleon transfer reactions are still not well understood. In this Letter, we investigate the mechanism of the CE from different viewpoints by using the extended version of the dinuclear system model (DNS-sysu) and the improved quantum molecular dynamics (ImQMD) model. From the macroscopic and microscopic dynamical viewpoints, we find incomplete CE for the mass asymmetry reaction systems even in the very deep collisions, and the behavior of "inverse CE" that the tendency of the fragments is away from the $N/Z$ value of the compound system in the reaction $^{140}$Xe + $^{198}$Pt. Unlike the slow process presented in the ImQMD model, the behavior of fast equilibration with the characteristic time $\sim$ 0.52 zs is obtained based on the DNS-sysu model, which is consistent with the experimental data. By performing the systematic calculation, the correlation between the CE and the mass asymmetry of the reaction systems is clarified, which not only accounts for the observed intriguing phenomena of the CE but also provides essential information for producing the neutron-rich isotopes around $N = 126$.
