Effects of an odd particle on shape phase transitions in odd-even systems  

作　　者：Chang Xiu Yu Zhang Ming-Jin Li Jie Yang Yan-Xia Chen 修畅;张宇;李明谨;杨杰;陈艳霞(Department of Physics,Liaoning Normal University,Dalian 116029,China;Software Institute,Dalian Jiaotong University,Dalian 116028,China;Department of Physics,Dalian Medical University,Dalian 116044,China)

机构地区：[1]Department of Physics,Liaoning Normal University,Dalian 116029,China [2]Software Institute,Dalian Jiaotong University,Dalian 116028,China [3]Department of Physics,Dalian Medical University,Dalian 116044,China

出　　处：《Chinese Physics C》2021年第8期110-118,共9页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11875158)。

摘　　要：A scheme to solve the Hamiltonian in the interacting boson-fermion model in terms of the SU(3)coupling basis is introduced,through which the effects of an odd particle on shape phase transitions(SPTs)in odd-A nuclei are examined by comparing the critical behaviors of some selected quantities in odd-even and even-even systems.The results indicate that the spherical to prolate(U(5)-SU(3))SPT and spherical to γ-soft (U(5)-O(6))SPT may clearly occur in the odd-even system with the SPT signatures revealed by various quantities including the excitation energies,energy ratio,B(E2)ratio,quadrupole moments,and one-particle-transfer spectroscopic intensities.In particular,the results indicate that the spherical to prolate SPT in the odd-even system can even be strengthened by the effects of the odd particle with the large fluctuations of the quadrupole deformations appearing near the critical point.

关 键 词：interacting boson-fermion model SU(3)basis shape phase transition effects of the odd particle 

分 类 号：O571[理学—粒子物理与原子核物理]