Octupole correlations in stable nucleus ^(153)Eu within reflection-asymmetric particle rotor model  

作　　者：Yuanyuan Wang Shuangquan Zhang 王媛媛;张双全(Mathematics and Physics Department,North China Electric Power University,Beijing 102206,China;Hebei Key Laboratory of Physics and Energy Technology,North China Electric Power University,Baoding 071000,China;State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University,Beijing 100871,China)

机构地区：[1]Mathematics and Physics Department,North China Electric Power University,Beijing 102206,China [2]Hebei Key Laboratory of Physics and Energy Technology,North China Electric Power University,Baoding 071000,China [3]State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University,Beijing 100871,China

出　　处：《Chinese Physics C》2025年第1期216-222,共7页中国物理C(英文版)

基　　金：Supported partly by the National Key R&D Program of China(2024YFE0109803);the National Natural Science Foundation of China(12205097,11935003,12141501);the Fundamental Research Funds for the Central Universities(2024MS071);the State Key Laboratory of Nuclear Physics and Technology,Peking University(NPT2023ZX03);the High Performance Computing Platform of Peking University。

摘　　要：The observed low-lying K=5/2^(±) positive-and negative-parity bands in the stable nucleus ^(153)Eu are investigated using the reflection-asymmetric triaxial particle rotor model.The experimental energy spectra,energy staggering parameters,and intraband E2 and M1 transition probabilities are well reproduced.The calculated interband B(E1)values are found to depend sensitively on the octupole deformation parameter β_(30),although the energy spectra and intraband E2 and M1 transitions can be reproduced without the octupole degree of freedom.The observed enhanced E1 transition probabilities can be reproduced with β_(30)=0.05.The detailed analysis of the intrinsic wave functions shows these nearly degenerate positive-and negative-parity bands are built on two individual proton configurations,i.e.,dominated by πg_(7/2)[Ω=5/2]and πh_(11/2)[Ω=5/2],respectively,which differs from the parity doublet bands built on a single parity-mixed configuration.

关 键 词：octupole correlations parity doublet bands electromagnetic transitions reflection-asymmetric triaxial particle rotor model 

分 类 号：O571[理学—粒子物理与原子核物理]