同位旋效应对F同位素s-d能级间隙的影响  

Isospin Effect on s-d Level Spacing of F Isotopes

作　　者：郭艳青[1] 任中洲[2] 

机构地区：[1]韩山师范学院物理与电子工程系,广东潮州521041 [2]南京大学物理学系,江苏南京210008

出　　处：《原子核物理评论》2011年第2期157-161,共5页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(10947106;10535010;10675090)~~

摘　　要：在单粒子势模型的框架下,计算了O同位素和F同位素的基态和某些低激发态的能级值、均方根半径值及密度分布。通过在伍兹-萨克逊势中引入同位旋依赖项,研究了同位旋效应对F同位素s-d能级间隙的影响。理论计算得到的均方根半径值和自旋宇称值与实验结果一致。尤其是,理论计算能够实现16F,15F和14F中2s1/2与1d5/2质子能级间的反转,且F同位素中s-d质子能级间隙及其整体变化趋势与已知实验结果符合较好。此外,理论结果表明17F的(1/2)+第一激发态为单质子晕态。The level structures of O and F isotopes are investigated in the framework of the single-particle potential model.The isospin effect on the s-d level spacing in F isotopes is studied by introducing an isospin-dependent term in the depth of the Woods-Saxon potential.The theoretical results of RMS radii and spin-parity values are in agreement with the experimental data.In particular,the level inversion between proton levels of 2s1/2 and 1d5/2 in 16F,15F and 14F is reproduced.The global tendency of the s-d level spacing agrees with the observed fact.In addition,the study confirms the one-proton halo structure in 17F（2s1/2）.

关 键 词：同位旋效应 能级反转 质子晕 

分 类 号：O571.2[理学—粒子物理与原子核物理]