相对论无规位相近似  

Relativistic Random Phase Approximation

作　　者：马中玉[1] 

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《原子核物理评论》2004年第2期90-92,共3页Nuclear Physics Review

基　　金：国家自然科学基金资助项目 ( 10 0 75 0 80 ;10 2 75 0 94) ;国家重点基础研究发展规划资助项目 (G2 0 0 0 0 7740 0 )~~

摘　　要：讨论了建立在相对论平均场基态的相对论无规位相近似研究中的一致性问题 .研究表明考虑费米海和Dirac海的粒子 空穴激发对核的同位旋标量巨共振的能量有很大的影响 .The fully consistent relativistic random phase approximation (RRPA) built on the relativist mean field (RMF) ground state is presented. The fully consistent RRPA requires that the nuclear RMF wave function and the RRPA renormalization are calculated in a same effective Lagrangian. A theoretically complete treatment of the RRPA at the mean-field level with no sea approximation must include not only the usual particle-hole states, but also the pairs formed from the occupied Fermi states and Dirac states. Effects of inclusion of Dirac sea states in various multipole excitations are investigated. Considerable effects on the isoscalar giant multipole resonances are observed.

关 键 词：相对论无规位相近似 相对论平均场 无海近似 同位旋标量巨共振 介子物理 

分 类 号：O572.33[理学—粒子物理与原子核物理] O571.251[理学—物理]