混合对称态对 Majorana相互作用的依赖性(英文)  

Majorana Interaction Dependence of Mixed Symmetric States

作　　者：龙桂鲁[1] 屠长存[2] 李岩松[2] 田琳[2] 纪华鹰[2] 朱胜江[2] 赵恩广[2] 刘风英[2] 

机构地区：[1]兰州重离子加速器国家实验室原子核理论中心,甘肃兰州730000 [2]清华大学物理系,北京100084

出　　处：《原子核物理评论》2001年第1期16-20,共5页Nuclear Physics Review

基　　金：国家基础研究重点计划项目! (G2 0 0 0 7740 0 ) ;国家自然科学基金!项目 (19775 0 2 6 ) ;霍英东青年教师基金 ;教育部优秀青年

摘　　要：在 IBM2中研究了混合对称态 .发现某些较高自旋的混合对称态随着 Majorana相互作用很快变化 .这个结果改变了传统的关于混合对称态的观点 :最大 F旋态的能量最低 ,F旋越小 ,能量越高 .Fmin或 Fmin- 1的态会成为 yrast或 yrare态 .这些态很难向下衰变 ,因而很稳定 .这个研究的结果表明可能存在一种由于质子和中子自由度的特殊性质而引起的新的同质异能态 .Mixed symmetry states were studied in the framework of the neutron proton interacting boson model(IBM2). It was found that some of the mixed symmetry states with moderate high spins changed very fast with respect to the Majorana interaction. This changes our traditional picture that the maximum F spin states are the lowest in energy, the smaller the F spin, the higher the energy. The minimum F spin states or the state with F spin next to minimum may become the yrast or yrare state. These states are difficult to decay and become very stable. This study suggests that a possible new mode of isomers may exists due to the special nature in their proton and neutron degrees of freedom.

关 键 词：相互作用玻色子模型 混合对称态 同质异能态 Majorana相互作用 

分 类 号：O571.21[理学—粒子物理与原子核物理]