Microscopic study of higher-order deformation effects on the ground states of superheavy nuclei around^(270)Hs  

作　　者：Xiao-Qian Wang Xiang-Xiang Sun Shan-Gui Zhou 王晓倩;孙向向;周善贵(CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Science,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Science,Beijing 100190,China [2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [3]School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Physics C》2022年第2期140-148,共9页中国物理C（英文版）

基　　金：Supporteds by the National Key R&D Program of China (2018YFA0404402);the National Natural Science Foundation of China (11525524, 12070131001,12047503, 11975237, 11961141004);the Key Research Program of Frontier Sciences of Chinese Academy of Sciences (QYZDB-SSWSYS013);the Strategic Priority Research Program of Chinese Academy of Sciences (XDB34010000, XDPB15);the IAEA Coordinated Research Project (F41033)

摘　　要：We investigate the effects of higher-order deformations β_(λ)(λ=4,6,8,and 10)on the ground state prop-erties of superheavy nuclei(SHN)near the doubly magic deformed nucleus ^(270)Hs using the multidimensionally-con-strained relativistic mean-field(MDC-RMF)model with five effective interactions:PC-PK1,PK1,NL3^(+),DD-ME2,and PKDD.The doubly magic properties of ^(270)Hs include large energy gaps at N=162 and Z=108 in the single-particle spectra.By investigating the binding energies and single-particle levels of ^(270)Hs in the multidimensional de-formation space,we find that,among these higher-order deformations,the deformationβ6 has the greatest impact onthe binding energy and influences the shell gaps considerably.Similar conclusions hold for other SHN near ^(270)Hs.Our calculations demonstrate that the deformation β_(6) must be considered when studying SHN using MDC-RMF.

关 键 词：density functional theory superheavy nuclei deformation effects 

分 类 号：O57[理学—粒子物理与原子核物理]