Sensitivity impacts owing to the variations in the type of zero-range pairing forces on the fission properties using the density functional theory  

作　　者：Yang Su Ze-Yu Li Li-Le Liu Guo-Xiang Dong Xiao-Bao Wang Yong-Jing Chen 

机构地区：[1]China Nuclear Data Center,China Institute of Atomic Energy,Beijing 102413,China [2]School of Science,Huzhou University,Huzhou 313000,China

出　　处：《Nuclear Science and Techniques》2024年第3期198-207,共10页核技术（英文）

基　　金：supported by the National Key R&D Program of China(No.2022YFA1602000);National Natural Science Foundation of China(Nos.12275081,U2067205,11790325,and U1732138);the Continuous-support Basic Scientific Research Project。

摘　　要：Using the Skyrme density functional theory,potential energy surfaces of^(240)Pu with constraints on the axial quadrupole and octupole deformations(q_(20)and q_(30))were calculated.The volume-like and surface-like pairing forces,as well as a combination of these two forces,were used for the Hartree–Fock–Bogoliubov approximation.Variations in the least-energy fission path,fission barrier,pairing energy,total kinetic energy,scission line,and mass distribution of the fission fragments based on the different forms of the pairing forces were analyzed and discussed.The fission dynamics were studied based on the timedependent generator coordinate method plus the Gaussian overlap approximation.The results demonstrated a sensitivity of the mass and charge distributions of the fission fragments on the form of the pairing force.Based on the investigation of the neutron-induced fission of^(239)Pu,among the volume,mixed,and surface pairing forces,the mixed pairing force presented a good reproduction of the experimental data.

关 键 词：Nuclear fission Density functional theory Pairing force Potential energy surfaces Fission fragment distribution 

分 类 号：O571.43[理学—粒子物理与原子核物理]