Xe、Ba和Ce同位素偶偶核形变演化研究  

Research on the shape evolution of even-even Xe,Ba and Ce isotopes

作　　者：黄海[1,2] 郭建友[1] 

机构地区：[1]安徽大学物理与材料科学学院,安徽合肥230039 [2]安徽医科大学生命科学学院,安徽合肥20032

出　　处：《安徽大学学报（自然科学版）》2014年第3期43-49,共7页Journal of Anhui University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(11175001);安徽省自然科学基金资助项目(11040606M07)

摘　　要：利用反射不对称相对论平均场理论(reflection asymmetric relativistic mean field,简称RAS-RMF)对Xe、Ba和Ce同位素偶偶核形状演化进行研究.结果表明:RAS-RMF理论能很好地描述Xe、Ba和Ce同位素偶偶核的基态性质,计算出的结合能和四极形变与已有的实验数据一致,八极形变对基态性质有重要影响.获得的物质密度分布清晰地展现出Xe、Ba和Ce同位素偶偶核的形状演化规律,反射不对称自由度在其中起重要作用.The ground state properties and the shape evolution of even-even Xe, Ba and Ce isotopes were investigated by the Reflection Asymmetric Relativistic Mean Field （RAS- RMF ） theory. Calculations showed that the RAS-RMF theory presented a good description on the properties of ground states for the consideration of reflecting asymmetric degree of freedom. The calculated binding energy agreed with the experimental data well. The shape evolution of even-even Xe, Ba and Ce isotopes were clearly demonstrated by the deformation parameters and matter density distributions. The results showed that octupole deformation had a significant influence on the ground state properties of nuclei, in which reflection asymmetric degree of freedom played an important role.

关 键 词：反射不对称相对论平均场 八极形变 形状演化 

分 类 号：O571.211[理学—粒子物理与原子核物理]