Mg,Si和S同位素链的壳反常  

Shell Anomalies of Mg, Si and S Isotopes

作　　者：钟显辉[1] 谭玉红[1] 宁平治[1] 

机构地区：[1]南开大学物理系,天津300071

出　　处：《高能物理与核物理》2003年第9期794-797,共4页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 (10 2 75 0 3 7);高等学校博士学科点专项科研基金 (2 0 0 10 0 5 5 0 12 );中国博士后基金 (2 0 0 2 0 3 2 169)资助 ~~

摘　　要：采用考虑轴向形变的相对论平均场理论 ,以双中子、双质子分离能隙δ2n δ2p作为壳封闭的特征 ,分析了Mg ,Si和S同位素链的壳封闭和壳反常 ,发现Mg同位素链在N =12 ,16处 ,Si同位素链在N =14 ,S同位素链在N =16处出现明显的壳封闭结构 ,Si同位素链在N =2 8处壳层结构并没有消失 .Mg ,Si和S同位素链在N =2The shell closure and shell anomalies of Mg, Si and S isotopes are investigated in the framework of relativistic mean-field theory. From two-proton and two-neutron separation gaps, we find that (1) there exist obvious shell effects at N=12, 16 in Mg isotopes, at N=14 in Si isotopes, and at N=16 in S isotopes, (2) the shell structure of Si isotopes at N=28 does not disappear, (3) the shell effects of Mg, Si and S isotopes at 20 are not very obvious.

关 键 词：Mg同位素链 Si同位素链 S同位素链 相对论平均场理论 双中子分离能隙 双质子分离能隙 壳封闭 壳反常 镁 硅 硫 奇特核 

分 类 号：O571.2[理学—粒子物理与原子核物理]