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arXiv 0801.0924nucl-th
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自旋轨道和张量平均场对自旋轨道分裂的影响(包括自洽核极化)

Spin-orbit and tensor mean-field effects on spin-orbit splitting including self-consistent core polarizations

M. Zalewski, J. Dobaczewski, W. Satula, T. R. Werner

摘要:

提出了一种新的拟合核能密度泛函的耦合常数的方法,将注意力从基态体性质转移到单粒子性质。后者进行了分析的裸单粒子的能量和质量,形状和自旋核极化效应。作为这个新方案的一个实际实现,提出了将等幅自旋轨道以及等幅和等矢量张量耦合常数直接拟合到40 Ca、56 Ni和48 Ca中的f5/2-f7/2自旋轨道分裂。它表明,这种适合需要急剧变化的等oscillator自旋轨道强度和张量耦合常数相比,普遍接受的值,但它显着和系统地改善基本的单粒子性质,包括自旋轨道分裂和魔隙能量。这些变化对核结合能的影响也进行了讨论。

英文摘要:

A new strategy of fitting the coupling constants of the nuclear energy density functional is proposed, which shifts attention from ground-state bulk to single-particle properties. The latter are analyzed in terms of the bare single-particle energies and mass, shape, and spin core-polarization effects. Fit of the isoscalar spin-orbit and both isoscalar and isovector tensor coupling constants directly to the f5/2-f7/2 spin-orbit splittings in 40Ca, 56Ni, and 48Ca is proposed as a practical realization of this new programme. It is shown that this fit requires drastic changes in the isoscalar spin-orbit strength and the tensor coupling constants as compared to the commonly accepted values but it considerably and systematically improves basic single-particle properties including spin-orbit splittings and magic-gap energies. Impact of these changes on nuclear binding energies is also discussed.

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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