Tetrahedral shape and Lambda impurity effect in ^(80)Zr with a multidimensionally constrained relativistic Hartree-Bogoliubov model  

作　　者：Dan Yang Yu-Ting Rong 杨丹;荣宇婷(Department of Physics,Guangxi Normal University,Guilin 541004,China;Guangxi Key Laboratory of Nuclear Physics and Technology,Guangxi Normal University,Guilin 541004,China)

机构地区：[1]Department of Physics,Guangxi Normal University,Guilin 541004,China [2]Guangxi Key Laboratory of Nuclear Physics and Technology,Guangxi Normal University,Guilin 541004,China

出　　处：《Chinese Physics C》2025年第2期137-146,共10页中国物理C(英文版)

基　　金：Supported by the National Natural Science Foundation of China(12205057);the Science and Technology Plan Project of Guangxi Province,China(Guike AD23026250);the Central Government Guides Local Scientific and Technological Development Fund Projects(Guike ZY22096024);the Research Basic Ability Enhancement Project for Young and Middle-aged Teachers in the Universities in Guangxi Province,China(2022KY0055);the National Natural Science Foundation of China(12365016);the Natural Science Foundation of Guangxi Province,China(2023GXNSFAA026016)。

摘　　要：This study investigated the tetrahedral structure in^(80)Zr and Lambda(Λ)impurity effect in^(81)ΛZr using the multidimensionally constrained relativistic Hartree-Bogoliubov model.The ground states of both^(80)Zr and^(81)ΛZr exhibit a tetrahedral configuration,accompanied by prolate and axial-octupole shaped isomers.Our calculations reveal that there are changes in the deformation parametersβ20,β30,andβ32 uponΛbinding to^(80)Zr,except forβ32 whenΛoccupies p-orbits.Compared to the two shape isomers,theΛparticle exhibits weaker binding energy in the tetrahedral state when occupying the 1/2+[000](Λs)or 1/2−[110]single-particle state.In contrast,the strongest binding occurs for theΛparticle in the 1/2−[101]state with tetrahedral shape.Besides,a largeΛseparation energy may not necessarily correlate with a significant overlap between the density distributions of theΛparticle and nuclear core,particularly for tetrahedral hypernuclei.

关 键 词：Y_(32)correlation ^(80)Zr hyperon impurity effect 

分 类 号：O571[理学—粒子物理与原子核物理]