Static or dynamic pear shapes in radioactive nucleus ^(224)Rn?  

作　　者：Xian-Ye Wu Jin-Ze Cao Kun-Ning Zhao Zhong-Min Liu Jian Xiang En-Fu Zhou 

机构地区：[1]College of Physics and Communication Electronics,Jiangxi Normal University,Nanchang 330022,China [2]Jiangxi Provincial Key Laboratory of Advanced Electronic Materials and Devices,Nanchang 330022,China [3]College of Physics and Electronic Engineering,Chongqing Normal University,Chongqing 401331,China [4]School of Physics and Astronomy,Sun Yat-sen University,Zhuhai 519082,China

出　　处：《Nuclear Science and Techniques》2024年第11期164-173,共10页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China (Nos. 12465020, 12005802, and 12005109);the Jiangxi Provincial Natural Science Foundation (20202BAB211008);the Jiangxi Normal University (JXNU) Initial Research Foundation Grant to Doctor (12019504);the Young Talents Program under JXNU (12019870);the PhD Foundation of Chongqing Normal University (No. 23XLB010);the Science and Technology Research Program of Chongqing Municipal Education Commission (No. KJQN202300509)

摘　　要：We report a comprehensive study on low-lying parity doublet states of ^(224)Rn by mixing both quadrupole-and octupoleshaped configurations in multireference covariant density functional theory,in which broken symmetries in configurations are restored using projection techniques.The low-lying energy spectrum is reasonably reproduced when the shape fluctuations in both the quadrupole and octupole shapes are considered.Electric octupole transition strength in ^(224)Rn is found to be B(E3;3_(1)^(-)→0_(1)^(+))=43 W.u.,comparable to that in ^(224)Ra,whose data are 42(3)W.u..Our results indicate that ^(224)Rn shares similar low-energy structure with ^(224)Ra despite the excitation energy of first 3^(−)state of the former nucleus is higher than that of the latter.This study suggests ^(224)Rn is a candidate for the search for permanent electric dipole moment.

关 键 词：Covariant density functional theory Parity doublet bands Octupole correlations Electric transition strengths 

分 类 号：O571[理学—粒子物理与原子核物理]