Spin–orbit splitting and the tensor component of the Skyrme interaction
Spin–orbit splitting and the tensor component of the Skyrme interaction
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DOI：
10.1016/j.physletb.2007.01.033
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发表时间：
2007-01
影响因子：
4.4
通讯作者：
G. Colò;H. Sagawa;S. Fracasso;P. F. B. .. D. D. Fisica-P.-F.-B.-..-D.-D.-Fisica-102564074;Universita' degli Studi;Infn;Sezione Infn di Milano-Sezione
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文献类型：
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作者：
G. Colò;H. Sagawa;S. Fracasso;P. F. B. .. D. D. Fisica-P.-F.-B.-..-D.-D.-Fisica-102564074;Universita' degli Studi;Infn;Sezione Infn di Milano-Sezione
我们研究了N=82和Z=50同位素中Skyrme有效相互作用的张量项对自旋-轨道分裂的作用。通过分析这些原子核的自旋轨道分裂，指出了三重偶张量力和三奇张量力的不同作用。这些分裂的实验同位旋依赖关系不能用通常的Skyrme参数化用Hartree-Fock计算来描述，但在引入张量相互作用时可以很好地解释。Skyrme力在重核中复制结合能和电荷半径的能力不会因为张量项的引入而被破坏。最后，我们还讨论了张量力对Gamow-Teller态质心的影响。
We study the role of the tensor term of the Skyrme effective interactions on the spin–orbit splittings in the N=82 isotones and Z=50 isotopes. The different role of the triplet-even and triplet-odd tensor forces is pointed out by analyzing the spin–orbit splittings in these nuclei. The experimental isospin dependence of these splittings cannot be described by Hartree–Fock calculations employing the usual Skyrme parametrizations, but is very well accounted for when the tensor interaction is introduced. The capability of the Skyrme forces to reproduce binding energies and charge radii in heavy nuclei is not destroyed by the introduction of the tensor term. Finally, we also discuss the effect of the tensor force on the centroid of the Gamow–Teller states.