Evolution of N=20,28,50 shell closures in the 20≤Z≤30 region in deformed relativistic Hartree-Bogoliubov theory in continuum  

作　　者：郑茹尤 孙向向 申国防 耿立升 Ru-You Zheng;Xiang-Xiang Sun;Guo-fang Shen;Li-Sheng Geng(School of Physics,Beihang University,Beijing,102206,China;School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China;Institut für Kernphysik,Institute for Advanced Simulation and Jülich Center for Hadron Physics,Forschungszentrum Jülich,D-52425 Jülich,Germany;CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China;Peng Huanwu Collaborative Center for Research and Education,Beihang University,Beijing 100191,China;Beijing Key Laboratory of Advanced Nuclear Materials and Physics,Beihang University,Beijing 102206,China;Southern Center for Nuclear-Science Theory(SCNT),Institute of Modern Physics,Chinese Academy of Sciences,Huizhou 516000,China)

机构地区：[1]School of Physics,Beihang University,Beijing,102206,China [2]School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China [3]Institut für Kernphysik,Institute for Advanced Simulation and Jülich Center for Hadron Physics,Forschungszentrum Jülich,D-52425 Jülich,Germany [4]CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China [5]Peng Huanwu Collaborative Center for Research and Education,Beihang University,Beijing 100191,China [6]Beijing Key Laboratory of Advanced Nuclear Materials and Physics,Beihang University,Beijing 102206,China [7]Southern Center for Nuclear-Science Theory(SCNT),Institute of Modern Physics,Chinese Academy of Sciences,Huizhou 516000,China

出　　处：《Chinese Physics C》2024年第1期144-153,共10页中国物理C（英文版）

基　　金：Supported in part by the National Natural Science Foundation of China(NSFC)(11975041,11961141004);Xiang-Xiang Sun is supported in part by NSFC(12205308);the Deutsche Forschungsgemeinschaft(DFG)and NSFC through the funds provided to the Sino-German Collaborative Research Center TRR110"Symmetries and the Emergence of Structure in QCD"(NSFC Grant No.12070131001,DFG Project-ID 196253076)。

摘　　要：Magicity,or shell closure,plays an important role in our understanding of complex nuclear phenomena.In this work,we employ one of the state-of-the-art density functional theories,the deformed relativistic Hartree-Bogoliubov theory in continuum(DRHBc)with the density functional PC-PK1,to investigate the evolution of the N=20,28,50 shell closures in the 20≤Z≤30 region.We show how these three conventional shell closures evolve from the proton drip line to the neutron drip line by studying the charge radii,two-neutron separation energies,two-neutron gaps,quadrupole deformations,and single-particle levels.In particular,we find that in the 21≤Z≤27 region,the N=50 shell closure disappears or becomes quenched,mainly due to the deformation effects.Similarly,both experimental data and theoretical predictions indicate that the N=28 shell closure disappears in the Mn isotopic chain,mainly due to the deformation effects.The DRHBc theory predicts the existence of the N=20 shell closure in the Ca,Sc,and Ti isotopic chains,but the existing data for the Ti isotopes suggest the contrary,and therefore further research is needed.

关 键 词：shell evolution covariant density functional theories magic numbers 

分 类 号：O571[理学—粒子物理与原子核物理]