Neutron skin thickness of ^(90)Zr and symmetry energy constrained by charge exchange spin-dipole excitations  

作　　者：程诗慧 温静 曹李刚 张丰收 Shi-Hui Cheng;Jing Wen;Li-Gang Cao;Feng-Shou Zhang(The Key Laboratory of Beam Technology and Energy Material,College of Nuclear Science and Technology,Beijing Normal University,Beijing 100875,China;Institute of Radiation Technology,Beijing Academy of Science and Technology,Beijing 100875,China;Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,China)

机构地区：[1]The Key Laboratory of Beam Technology and Energy Material,College of Nuclear Science and Technology,Beijing Normal University,Beijing 100875,China [2]Institute of Radiation Technology,Beijing Academy of Science and Technology,Beijing 100875,China [3]Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,China

出　　处：《Chinese Physics C》2023年第2期123-128,共6页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China (12275025, 11975096, 12135004, 11961141004, 11635003);the Fundamental Research Funds for the Central Universities (2020NTST06)。

摘　　要：The charge exchange spin-dipole(SD) excitations of ^(90)Zr are studied using the Skyrme Hartee-Fock plus proton-neutron random phase approximation with SAMi-J interactions.The experimental value of the model-independent sum rule obtained from the SD strength distributions of ^(90)Zr(p,n) ^(90)Nb and ^(90)Zr(n,p) ^(90)Y is used to deduce the neutron skin thickness.The neutron skin thickness Δr_(np) of ^(90)Zr is extracted as 0.083±0.032 fm,which is similar to the results of other studies.Based on the correlation analysis of the neutron skin thickness Δr_(np) and the nuclear symmetry energy J as well as its slope parameter L,a constraint from the extracted Δr_(np) leads to the limitation of J to 29.2±2.6 MeV and L to 53.3±28.2 MeV.

关 键 词：neutron skin symmetry energy charge exchange spin-dipole excitations proton-neutron random phase approximation 

分 类 号：O571.5[理学—粒子物理与原子核物理]