Approximate symmetries in nuclei and the 2νββ-decay rate

1996/08/22 by O. A. Rumyantsev, M. H. Urin
Physics and Astronomy · #nucl-th

paper · pdf

published as Bull.Russ.Acad.Sci.Phys. 60 (1996) 1682-1690; Izv.Ross.Akad.Nauk Ser.Fiz. 60 (1996) 18-30 · LaTeX, 10 pages

arxiv created 1996/08/22 · arxiv updated 2009/12/01

Abstract

A nonstandard method for calculating the nuclear 2νββ - decay amplitude is proposed. The method is based on the explicit use of those approximate symmetries of a nuclear hamiltonian, which correspond to the operators of allowed β -- transitions. Within the framework of the proposed method the mentioned amplitude is calculated for a wide range of nuclei. The model parameters used in calculations are taken from independent data. Calculated \bb half-lifes are compared with known experimental data.

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