The strength of the analog and Gamow-Teller giant resonances and hindrance of the 2νββ-decay rate

Details The strength of the analog and Gamow-Teller giant resonances and hindrance of the 2νββ-decay rate The strength of the analog and Gamow-Teller giant resonances and hindrance of the 2νββ-decay rate

1998-07-14

arxiv.org/abs/nucl-th/9807039v1

Phys.Lett. B443 (1998) 51-57

Physics

Nuclear Physics

Nuclear Theory

11 pages, 1 table

Scientific paper

10.1016/S0370-2693(98)01291-X

An approach for describing the hindrance of the nuclear 2\nu\beta\beta-decay amplitude is proposed. The approach is based on a new formula obtained by a model-independent transformation of the initial expression for the amplitude. This formula takes explicitly into account the hindrance of the decay-amplitude due to the presence of the collective Gamow-Teller state. Calculations are performed within the simplest version of the approach. Calculated and experimental 2\nu\beta\beta halve-lives are compared for a wide range of nuclei.

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