平均场加邻近轨道对力模型中^(160,162,164)Er基态中各角动量价核子对的占有率  

The ground state occupation probabilities of valence nucleon pairs with various angular momentum quantum numbers for ^(160,162,164)Er in the nilsson mean-field plus nearest-orbit pairing model

作　　者：潘峰[1] 李杭[1] 包莉娜[1] 史常亮[1] 刘轶彬[1] 

机构地区：[1]辽宁师范大学物理与电子技术学院,辽宁大连116029

出　　处：《辽宁师范大学学报（自然科学版）》2011年第3期286-289,共4页Journal of Liaoning Normal University:Natural Science Edition

基　　金：国家自然科学基金项目(10775064);辽宁省教育厅高等学校优秀人才支持计划项目(2007R28);教育部博士点专项基金项目(20102136110002)

摘　　要：利用严格可解的区分质子和中子的形变平均场加邻近轨道对力模型计算了160—170Er同位素的结合能和奇偶能差,并依此计算了模型中各角动量价核子对在160,162,164Er基态中的占有率.结果显示,偶数角动量价核子对占有率远远大于奇数角动量价核子对占有率,从而说明了S,D,G等偶数角动量价核子对在偶偶核基态中占有主要地位.Binding energies and even-odd mass differences of rare-earth 160-170Er nuclei are calculated by using the exactly solvable mean-filed plus nearest-orbit pairing model and compared with the corresponding experimental values.The occupation probability of valence nucleon pairs in a given energy eigenstate is defined and used to calculate the ground state occupation probabilities of valence nucleon pairs with various angular momentum quantum number for 160,162,164Er in the model fitted.The analysis shows that the occupation probabilities of valence nucleon pairs with even angular momenta are much larger than those with odd angular momenta.The results clearly indicate that S,D,G valence nucleon pairs dominate in the ground state of these nuclei.

关 键 词：形变平均场 邻近轨道相互作用对力 价核子对占有率 

分 类 号：O413.3[理学—理论物理]