Production of neutron-rich N=126 nuclei in multinucleon transfer reactions: Comparison between Xe-136+Pt-198 and U-238+Pt-198 reactions
Production of neutron-rich N=126 nuclei in multinucleon transfer reactions: Comparison between Xe-136+Pt-198 and U-238+Pt-198 reactions
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多核子转移反应中富中子 N=126 核的产生：Xe-136 Pt-198 和 U-238 Pt-198 反应之间的比较
DOI：
10.1016/j.physletb.2021.136101
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发表时间：
2021
影响因子：
4.4
通讯作者：
Wang N.
中科院分区：
文献类型：
--
作者：
Zhao K.;Liu Z.;Zhang F. S.;Wang N.
用改进的量子分子动力学模型（ImQMD）结合统计蒸发模型（HIVAP）计算了入射能量为8 MeV/核子的136 U +198 Pt和238 U +198 Pt两个反应体系的初级和剩余碎片的产生截面.结果表明，由于238 U诱导反应中的初级碎片截面较大，激发能较低，因此238 U +198 Pt中的富n N= 126剩余碎片截面比136 U +198 Pt中的大几倍。在这两个系统中，N= 126的半魔残留物通过初级碎片的衰变中的中子发射产生，其在半中心碰撞中存活并且具有较低的激发能。
The production cross sections for primary and residual fragments produced in two reaction systems 136Xe+ 198Pt and 238U+ 198Pt at incident energy 8 MeV/nucleon are calculated by improved quantum molecular dynamics (ImQMD) model incorporated with the statistical evaporation model (HIVAP code). It is found that the cross sections for n-rich N= 126 residual fragments are several times larger in 238U+198Pt than in 136Xe+198Pt due to the larger cross sections and lower excitation energies of primary fragments in 238U induced reactions. In both systems, N= 126 semi-magic residues are produced via neutron emission in the decay of primary fragments, which survive in the semi-central collisions and have lower excitation energies.