复动量表象方法对“反转岛”核^(33)Mg基态性质的研究  

Study on'Island of Inversion'Nucleus^(33)Mg Ground State Properties by Complex Momentum Representation Method

作　　者：魏亚蒙 刘泉[1] WEI Yameng;LIU Quan(School of Physics and Optoelectronic Engineering,Anhui University,Hefei 230601,China)

机构地区：[1]安徽大学物理与光电工程学院,合肥230601

出　　处：《原子核物理评论》2023年第2期188-192,共5页Nuclear Physics Review

基　　金：兰州重离子加速器国家实验室高端用户项目(HIR2021PY005);安徽省自然科学基金项目(2008085MA26)。

摘　　要：反转岛内原子核奇特结构的研究一直是现代核物理学研究的热点。应用复动量表象(CMR)方法来研究原子核的共振态,计算了^(33)Mg束缚态和共振态的单粒子能量及其随形变参数β_(2)的变化情况。在最后一个价中子占据的能级上检验了主要构型的占据几率,并计算其径向密度分布。结果表明,^(33)Mg的基态发生了单粒子能级的p-f反转,其最后一个价中子占据在入侵的能级上。同时,预测了^(33)Mg的形变区间处于0.49与0.55之间,这一预测结果与^(33)Mg附近同位素的形变值相近。The study of the exotic structure of nuclei in the island of inversion has always been a hot topic in modern nuclear physics.In this paper,we apply the Complex Momentum Representation(CMR)method to study the resonant states of nuclei.We calculate the single particle bound and resonant energies of^(33)Mg and their variation with the deformation parameterβ_(2).The occupancy probabilities of the main configurations are tested at the energy level occupied by the last valence neutron and the radial density distributions are calculated.The results show that the ground state of^(33)Mg has undergone a p-f inversion of the single particle level,and its last valence neutron occupies the intruder energy level.Meanwhile,the deformation range of^(33)Mg is about 0.49≤β_(2)≤0.55,which is similar to the deformation values of isotopes around^(33)Mg.

关 键 词：复动量表象方法 单粒子共振态 反转岛 

分 类 号：O571.2[理学—粒子物理与原子核物理]