Time-odd mean fields in covariant density functional theory: Nonrotating systems

A. V. Afanasjev and H. Abusara
Phys. Rev. C 81, 014309 – Published 20 January 2010

Abstract

Time-odd mean fields (nuclear magnetism) are analyzed in the framework of covariant density functional theory (CDFT) by blocking the single-particle states with a fixed signature. 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 relativistic mean-field 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 a profound effect on the properties of odd-proton nuclei in the vicinity of the proton drip line. Their presence can modify the half-lives of proton emitters (by many orders of magnitude in light nuclei) and considerably affect the possibilities of their experimental observation.

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  • Received 25 March 2009

DOI:https://doi.org/10.1103/PhysRevC.81.014309

©2010 American Physical Society

Authors & Affiliations

A. V. Afanasjev* and H. Abusara

  • Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA

  • *afansjev@erc.msstate.edu

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Vol. 81, Iss. 1 — January 2010

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