Pairing effects on the fragment mass distribution of Th,U,Pu,and Cm isotopes

作     者：Xin Guan Jin‑Huan Zheng Mei‑Yan Zheng Xin Guan;Jin-Huan Zheng;Mei-Yan Zheng

作者机构：Department of PhysicsLiaoning Normal UniversityDalian 116029China 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2023年第34卷第11期

页      面：128-139页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0827[工学-核科学与技术] 0702[理学-物理学] 

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.12275115 and 12175097) the Educational Department of Liaoning Province(No.LJKMZ20221410). 

主　　题：Nuclear fission Pairing interaction Fragment mass distribution Actinide nuclei 

摘      要：In this article,a comprehensive study of the fission process of Th,U,Pu,and Cm isotopes using a Yukawa-folded meanfield plus standard pairing model is presented.The study focused on analyzing the effects of the pairing interaction on the fragment mass distribution and its dependence on nuclear elongation.The significant role of pairing interactions in the fragment mass distributions of^(230)Th,^(234)U,^(240)Pu,and^(246)Cm was demonstrated.Numerical analysis revealed that increasing the pairing interaction strength decreased the asymmetric fragment mass distribution and increased the symmetric distribution.Furthermore,the odd-even mass differences at symmetric and asymmetric fission points were examined,highlighting their sensitivity to changes in the pairing interaction strength.Systematic analysis of the Th,U,Pu,and Cm isotope fragment mass distributions demonstrated the effectiveness of the model in reproducing the experimental data.In addition,the effects of the zero-point energy and half-width parameter on the fragment mass distribution for^(240)Pu were explored.Thus,this study provides valuable insights into the fission process by emphasizing the importance of pairing interactions and their relationship with nuclear elongation.