Local variations of charge radii for nuclei with even Z from 84 to 120  

作　　者：Rong An Xiao-Xu Dong Li-Gang Cao Feng-Shou Zhang 

机构地区：[1]Key Laboratory of Beam Technology of Ministry of Education,Institute of Radiation Technology,Beijing Academy of Science and Technology,Beijing 100875,China [2]Key Laboratory of Beam Technology of Ministry of Education,College of Nuclear Science and Technology,Beijing Normal University,Beijing 100875,China [3]CAS Key Laboratory of High Precision Nuclear Spectroscopy,Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China [4]School of Physics,Beihang University,Beijing 102206,China [5]Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,China

出　　处：《Communications in Theoretical Physics》2023年第3期75-83,共9页理论物理通讯（英文版）

基　　金：funded by the Key Laboratory of High Precision Nuclear Spectroscopy,Institute of Modern Physics,Chinese Academy of Sciences;supported partly by the National Natural Science Foundation of China under Grants No.12135004,No.11635003,No.11961141004 and No.12047513;the support of the National Natural Science Foundation of China under Grants No.11975096;the Fundamental Research Funds for the Central Universities(2020NTST06)。

摘　　要：Pronounced changes of nuclear charge radii provide a stringent benchmark on the theoretical models and play a vital role in recognizing various nuclear phenomena.In this work,the systematic evolutions of nuclear charge radii along even Z=84-120 isotopic chains are first investigated by the recently developed new ansatz under the covariant density functional.The calculated results show that the shell closure effects of nuclear charge radii appear remarkably at the neutron numbers N=126 and 184.Interestingly,the arch-like shapes of charge radii between these two strong neutron-closed shells are naturally observed.Across the N=184 shell closure,the abrupt increase in charge radii is still evidently emerged.In addition,the rapid raise of nuclear charge radii from the neutron numbers N=138 to N=144 is disclosed clearly in superheavy regions due to the enhanced shape deformation.

关 键 词：covariant density functional shell closure effect shape phase transition 

分 类 号：O571[理学—粒子物理与原子核物理]