轻核区双中子滴线核的研究  

Study of Two-neutron Drip Line Nuclei in Region of Light Nuclei

作　　者：圣宗强[1] 郭建友[2] 

机构地区：[1]安徽理工大学数理系,安徽淮南232001 [2]安徽大学物理与材料科学学院,安徽合肥230039

出　　处：《原子核物理评论》2008年第2期117-122,共6页Nuclear Physics Review

基　　金：安徽省高校青年教师自然科学基金资助项目(2006jq1076);安徽省教育厅自然科学基金资助项目(2006KJ056C,2006KJ259B);国家自然科学基金资助项目(10475001,10675001);教育部新世纪优秀人才支持计划基金资助项目(NCET-05-0558);安徽省高等学校拔尖人才基金资助项目~~

摘　　要：运用形变相对论平均场(RMF)理论系统地研究了轻核区的元素O,Ne,Mg,Si,S,Ar和Ca及Ni。计算了这8个元素的偶-偶核基态的一些性质,如结合能、四极形变、平均每核子结合能以及双中子分离能等。计算中采用了NL3参数组,并用BCS方法处理对关联。限于篇幅,文中只给出O和Mg元素的计算结果。RMF理论计算的结果和实验值基本一致。从双中子分离能的分析可知,RMF理论计算的各元素的双中子滴线核分别为30O,38Ne,42Mg,52Si,54S,60Ar,80Ca和98Ni。最后简单讨论了Ca和Ni同位素中的中子幻数情况。The ground state properties of even-even O, Ne, Mg, Si, S, Ar, Ca and Ni isotopes were studied with the self-consistent deformed relativistic mean field theory with NL3 parameter set. The calculated results of O and Mg isotopes were presented in detail. The calculated binding energies and the two-neutron separation energies were in good agreement with experimental values. By examining the two-neutron separation energies, it was suggested that ^30O,^38Ne,^42Mg,^52Si,^54S,^60Ar,^80Ca and^ 98Ni are the two-neutron drip line nuclei. We also briefly discussed the possible changes of neutron magic numbers in Ca and Ni isotopes.

关 键 词：相对论平均场 滴线核 双中子分离能 

分 类 号：O571.2[理学—粒子物理与原子核物理] O571.21[理学—物理]