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arXiv 0905.2445nucl-th
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协变密度泛函理论中的时奇平均场I。非旋转系统

Time-odd mean fields in covariant density functional theory I. Non-rotating systems

A. V. Afanasjev, H. Abusara

摘要:

在协变密度泛函理论(CDFT)的框架下,分析了时奇平均场(核磁)。结果表明,它们总是提供额外的结合到奇数质量核的结合能。这种额外的约束力仅弱依赖于RMF参数化,反映了CDFT中时间奇平均场性质的良好局部化。详细讨论了其微观机理。时间奇平均场影响奇偶质量差。然而,我们的分析表明,配对相关性的强度,以弥补其影响的修改是适度的。相反,时间奇平均场对质子滴线附近的奇质子核性质有着深刻的影响。它们的存在可以改变质子发射体的半衰期(在轻核中可以改变许多数量级),并大大影响其实验观察的可能性。

英文摘要:

Time-odd mean fields (nuclear magnetism) are analyzed in the framework of covariant density functional theory (CDFT). It is shown that they always provide additional binding to the binding energies of odd-mass nuclei. This additional binding only weakly depends on the RMF parametrization reflecting good localization of the properties of time-odd mean fields in CDFT. The underlying microscopic mechanism is discussed in detail. Time-odd mean fields affect odd-even mass differences. However, our analysis suggests that the modifications of the strength of pairing correlations required to compensate for their effects are modest. In contrast, time-odd mean fields have profound effect on the properties of odd-proton nuclei in the vicinity of proton-drip line. Their presence can modify the half-lives of proton-emitters (by many orders of magnitude in light nuclei) and affect considerably the possibilities of their experimental observation.

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