Exploration of the ground state properties of neutron-rich sodium isotopes using the deformed relativistic mean field theory in complex momentumrepresentations with BCS pairings  

作　　者：罗雨轩 刘泉 郭建友 Yu-Xuan Luo;Quan Liu;Jian-You Guo(School of physics and Optoelectronic Engineering,Anhui University,Hefei 230601,China)

机构地区：[1]School of physics and Optoelectronic Engineering,Anhui University,Hefei 230601,China

出　　处：《Chinese Physics C》2024年第4期115-129,共15页中国物理C（英文版）

基　　金：Partly supported by the National Natural Science Foundation of China (11935001, 11575001);the Natural Science Foundation of Anhui Province(2008085MA26);Anhui project (Z010118169);the Heavy Ion Research Facility in Lanzhou (HIRFL)(HIR2021PY007);the project of Key Laboratory of High Precision Nuclear Spectroscopy conducted in Chinese Academy of Sciences.

摘　　要：This study explores the ground-state characteristics of neutron-rich sodium isotopes,encompassing two-neutron separation energies,root-mean-square radii,quadrupole moments of proton and neutron distributions,single-particle levels of bound and resonant states,and neutron density distributions and shapes.Simultaneously,special attention is paid to the distinctive physical phenomena associated with these isotopes.The deformed relativistic mean field theory in complex momentum representations with BCS pairings(DRMF-CMR-BCS)employed in our research provides resonant states with real physics,offering insights into deformed halo nuclei.Four effective interactions(NL3,NL3^(*),PK1,and NLSH)were considered to assess the influence of continuum and deformation effects on halo structures.Calculations for odd-even nuclei ^(35–43)Na revealed the dependence on the chosen effective interaction and number of considered resonant states.Neutron occupation patterns near the Fermi surface,particularly in orbitals 1/2^(−)_(3) and 3/2^(−)_(2),were determined to be crucial in halo formation.The study provided detailed insights into the density distributions,shape evolution,and structure of neutron-rich sodium isotopes,contributing valuably to the field of nuclear physics.

关 键 词：relativistic mean field complex momentum representations resonant states halo nuclei 

分 类 号：O571[理学—粒子物理与原子核物理]