自洽处理对关联的RMF+SLAP方法对Sn核性质的研究  

Properties of Sn Isotopes in the Self-consistent RMF+SLAP for Pairing Correlations

作　　者：刘朗[1] 孟杰[1] 张双全[1] 

机构地区：[1]北京大学物理学院,北京100871

出　　处：《高能物理与核物理》2006年第4期299-305,共7页High Energy Physics and Nuclear Physics

基　　金：国家重点基础研究发展规划(G2000077407)国家自然科学基金(10435010;10221003;10505002)资助

摘　　要：在自洽的相对论平均场理论框架下,用严格保持粒子数守恒的类壳模型方法,即RMF+SLAP方法,研究了Sn周位素链的性质并与没有考虑对关联对平均势场影响的非自洽计算进行了比较．结果表明,自洽的RMF+SLAP方法能够正确给出原子核形变随平均对力强度的变化,给出Sn同位素链的每核子结合能,单中子与双中子分离能,四极形变随质量数A的变化等的很好描述．表明了研究原子核性质时,正确和自洽处理对关联以及堵塞效应的重要性．Nuclear properties of stannum isotopes have been studied by the self-consistent shell-model-like approach in the framework Relativistic Mean Field theory, i.e., RMF＋SLAP, and compared with the results from the non selfconsistent RMF＋SLAP^＊ in which the influence of the pairing correlations on the mean field has been neglected. It is shown that the RMF＋SLAP method can reproduce correctly the change of the quadrupole deformation as a function of pairing strength, the binding energy, one- and two-neutron separation energies and quadrupole deformation of stannum isotopes. The importance in treating the pairing correlations and block effect correctly has been emphasized.

关 键 词：相对论平均场理论 对关联 类壳模型方法 Sn同位素 

分 类 号：O571.22[理学—粒子物理与原子核物理] TN248.402[理学—物理]