Fission Properties of Neutron-Rich Nuclei around the End Point of r-Process

作     者：陈佳炜 裴俊琛 强雨 迟济怀 Jiawei Chen;Junchen Pei;Yu Qiang;Jihuai Chi

作者机构：State Key Laboratory of Nuclear Physics and TechnologySchool of PhysicsPeking UniversityBeijing 100871China 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2023年第40卷第1期

页      面：23-27页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：supported by the National Key R&D Program of China(Grant No.2018YFA0404403) the National Natural Science Foundation of China(Grant Nos.11975032,11835001,11790325,and 11961141003) 

主　　题：Hartree dynamical asymmetric 

摘      要：We studied the fission properties of neutron-rich nuclei278,286Cf around the end point of r-process by microscopic self-consistent approaches. The fission barriers and potential energy surfaces are obtained by constrained static Skyrme Hartree–Fock-BCS calculations. Fission fragments are studied by dynamical time-dependent Hartree–Fock+BCS calculations. Results show that286Cf has an octupole deformation at ground state, which can increase the fission barrier height by 1.1 Me V and enhance significantly the spontaneous fission half-life. To search possible fission channels, dynamical calculations with a broad coverage of initial deformations result in two slightly asymmetric peaks around A=128 and 150 for278Cf, and A=133 and 153 for286Cf. Very asymmetric fission channels as given by semi-empirical models are not found in our results.