Approximate symmetries in nuclei and the $2νββ$-decay rate
Abstract
Description
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.
LaTeX, 10 pages
LaTeX, 10 pages