核子配对壳模型计算中的多体效应  

MANY-BODY EFFECTS IN THE CALCULATION OF NUCLEON-PAIR SHELL MODEL

作　　者：范鹏东[1] 陈金全[1] 

机构地区：[1]南京大学物理系,南京210093

出　　处：《物理学进展》2000年第1期35-51,共17页Progress In Physics

基　　金：国家自然科学基金资助

摘　　要：截断到S ,D子空间的核子配对壳模型用于原子核1 2 8- 1 34 Xe和1 30 - 1 36 Ba的计算。为考虑多体效应 ,S ,D对分别用变分法和Tamm Dancoff近似给定。用一个含有三个参数的哈密顿量系统地描述了Xe和Ba同位素的能谱 ,本征态和电磁跃迁的强度。所得结果和实验结果符合得较好 ,并且在一定程度上改善了用表面δ相互作用决定的S ,D对所得结果中的不足之处。The nucleon pair shell model truncated to the S,D subspace is applied to the nuclei 128-134 Xe and 130-136 Ba. For considering the many body effects,the S,D pairs are determined by variational method and Tamm Dancoff approximation method,respectively.The spectra,eigenstates and electromagnetic transition strengths in Xe and Ba nuclei have been described systematically by a Hamiltonian with three parameters.The agreements with the experiments are reasonable well, and the weak points in the results obtained by using the S,D pairs determined by surface delta interaction have been improved.

关 键 词：核子配对壳模型 多体效应 集体态 原子核 

分 类 号：O571.21[理学—粒子物理与原子核物理]