Proton-neutron symplectic model description of ^(106)Cd  

作　　者：H.G.Ganev 

机构地区：[1]Joint Institute for Nuclear Research,Dubna,Russia [2]Institute of Mechanics,Bulgarian Academy of Sciences,Sofia,Bulgaria

出　　处：《Chinese Physics C》2024年第3期169-179,共11页中国物理C（英文版）

摘　　要：In this study,a microscopic shell-model description of the low-lying collective states in the weakly deformed nucleus ^(106)Cd within the recently proposed microscopic version of the Bohr-Mottelson model is provided.A good description of the excitation energies of the lowest ground,γ,andβquasibands is obtained without the adjustable kinetic energy term.Furthermore,γdegrees of freedom are shown to play a crucial role in the description of spectroscopy of this nucleus.A modified SU(3)SU(3)preserving high-order interaction is used to produce aγ-unstable type of odd-even staggering,observed experimentally between the states of the quasi-γband.The current approach enables the characterization of observed intraband and interband quadrupole collectivity.The findings of this study propose an alternative interpretation of the fundamental question regarding the nature of low-energy vibrations,as well as the emergence of deformation and collectivity in weakly deformed atomic nuclei.

关 键 词：shell-model version of the Bohr-Mottelson model proton-neutron symplectic model Sp(12 R)dynamical algebra quadrupole dynamics 

分 类 号：O571[理学—粒子物理与原子核物理]