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
-
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 singleparticle potential model. The isospin effect on the sd level spacing in F isotopes is studied by introducing an isospindependent term in the depth of the WoodsSaxon potential. The theoretical results of RMS radii and spinparity 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 oneproton halo structure in 17F(2s1/2).Abstract: The level structures of O and F isotopes are investigated in the framework of the singleparticle potential model. The isospin effect on the sd level spacing in F isotopes is studied by introducing an isospindependent term in the depth of the WoodsSaxon potential. The theoretical results of RMS radii and spinparity 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 oneproton halo structure in 17F(2s1/2).