β-decay studies approaching the N=20 island of inversion with a new shell-model Hamiltonian  

作　　者：WeiGuang Jiang BaiShan Hu FuRong Xu Rui Han Hui Hua 

机构地区：[1]School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University

出　　处：《Science China(Physics,Mechanics & Astronomy)》2017年第8期15-20,共6页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Key Basic Research Program of China(Grant No.2013CB834402);the National Natural Science Foundation of China(Grant Nos.11235001,11320101004,and 11575007);the China-U.S.Theory Institute for Physics with Exotic Nuclei(CUSTIPEN)funded by the U.S.Department of Energy,Office of Science(Grant No.DESC0009971)

摘　　要：β-decay properties of N=18-22,Z=10-14 nuclei are analyzed with a new shell-model Hamiltonian using the Gogny densitydependent interaction.The Gogny force which has been widely and successfully used in mean-field theory can provide reasonable two-body matrix elements for cross-shell calculations.The log f t values andβ-decay level schemes are systematically studied using the D1S-Gogny interaction and compared with the SDPF-M results and experimental data.It is shown that the new Hamiltonian provides reliable results forβ-decay along with subtle level schemes for this region.Shell-model calculations with Gogny interaction can lead to a successful description of nuclei in and around the N=20 island of inversion and supplements experiment where sufficient data are not available.β-decay properties of N=18-22, Z=10-14 nuclei are analyzed with a new shell-model Hamiltonian using the Gogny density- dependent interaction. The Gogny force which has been widely and successfully used in mean-field theory can provide rea- sonable two-body matrix elements for cross-shell calculations. The logft values and β-decay level schemes are systematically studied using the D1S-Gogny interaction and compared with the SDPF-M results and experimental data. It is shown that the new Hamiltonian provides reliable results for β-decay along with subtle level schemes for this region. Shell-model calculations with Gogny interaction can lead to a successful description of nuclei in and around the N=20 island of inversion and supplements experiment where sufficient data are not available.

关 键 词：island of inversion β decay shell model Gogny interaction 

分 类 号：O571.322[理学—粒子物理与原子核物理]