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arXiv 0704.0731nucl-th
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Skyrme能量密度泛函的张量部分。I.球形核

The tensor part of the Skyrme energy density functional. I. Spherical nuclei

T. Lesinski, M. Bender, K. Bennaceur, T. Duguet, J. Meyer

摘要:

本文系统地研究了Skyrme能量泛函中的J^2张量项对球核性质的影响。在Skyrme能量泛函中,张量项来源于零程中心力和张量力。我们建立了一套36参数化,它涵盖了广泛的参数空间的isoscope和isovector张量项耦合常数,与适合的协议非常相似的成功的SLy参数化。我们分析了张量项对球形平均场计算中大量可观测量的影响,例如双魔核的自旋轨道分裂和单粒子谱,半魔核链上自旋轨道分裂的演化,球形核的质量残差,以及已知的电荷半径异常。我们的主要结论是,目前使用的中心和自旋轨道部分的Skyrme能量密度功能不够灵活,允许存在的大张量项。

英文摘要:

We perform a systematic study of the impact of the J^2 tensor term in the Skyrme energy functional on properties of spherical nuclei. In the Skyrme energy functional, the tensor terms originate both from zero-range central and tensor forces. We build a set of 36 parameterizations, which covers a wide range of the parameter space of the isoscalar and isovector tensor term coupling constants, with a fit protocol very similar to that of the successful SLy parameterizations. We analyze the impact of the tensor terms on a large variety of observables in spherical mean-field calculations, such as the spin-orbit splittings and single-particle spectra of doubly-magic nuclei, the evolution of spin-orbit splittings along chains of semi-magic nuclei, mass residuals of spherical nuclei, and known anomalies of charge radii. Our main conclusion is that the currently used central and spin-orbit parts of the Skyrme energy density functional are not flexible enough to allow for the presence of large tensor terms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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