Tensor interaction contributions to single-particle energies
Tensor interaction contributions to single-particle energies
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DOI：
10.1103/physrevc.74.061303
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发表时间：
2006-11
影响因子：
3.1
通讯作者：
B. A. Brown;T. Duguet;T. Otsuka;D. Abe;T. Suzuki
中科院分区：
文献类型：
--
作者：
B. A. Brown;T. Duguet;T. Otsuka;D. Abe;T. Suzuki
在有限范围G矩阵势和零程Skyrme势下，计算了核子-核子张量相互作用对单粒子能量的贡献。SKX Skyrme参数，包括强度校准为有限范围结果的零程张量项，被修正为适合于核性质。这种拟合允许零程质子-中子张量相互作用被校准为有限程势的结果，从而给出了观测到的单粒子能隙{epsilon}(h{sub11/2})-{epsilon}(g{sub7/2})从{sup 114}锡到{sup 132}锡的变化。然而，由于总的自旋-轨道势的径向依赖关系的改变，当加入张量时，不能很好地描述在{sup132}sn和{sup208}pb中的自旋-轨道分裂的实验L依赖关系。当类粒子张量相互作用与G矩阵所需的张量相互作用符号相反时，能很好地恢复带隙移动和对L依赖关系的拟合。
We calculate the contribution of the nucleon-nucleon tensor interaction to single-particle energies with finite-range G-matrix potentials and with zero-range Skyrme potentials. The Skx Skyrme parameters including the zero-range tensor terms with strengths calibrated to the finite-range results are refitted to nuclear properties. The fit allows the zero-range proton-neutron tensor interaction as calibrated to the finite-range potential results which gives the observed change in the single-particle gap {epsilon}(h{sub 11/2})-{epsilon}(g{sub 7/2}) going from {sup 114}Sn to {sup 132}Sn. However, the experimental l dependence of the spin-orbit splittings in {sup 132}Sn and {sup 208}Pb is not well described when the tensor is added, owing to a change in the radial dependence of the total spin-orbit potential. The gap shift and a good fit to the l dependence can be recovered when the like-particle tensor interaction is opposite in sign to that required for the G matrix.