Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1996-08-22
Bull.Russ.Acad.Sci.Phys. 60 (1996) 1682-1690; Izv.Ross.Akad.Nauk Ser.Fiz. 60 (1996) 18-30
Physics
Nuclear Physics
Nuclear Theory
LaTeX, 10 pages
Scientific paper
A nonstandard method for calculating the nuclear $2\nu\beta\beta$ - 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 $\beta$ -- 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.
Rumyantsev O. A.
Urin Michael H.
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