Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2004-12-27
Physics
Nuclear Physics
Nuclear Theory
39 pages, 5 figures
Scientific paper
10.1103/PhysRevC.71.024307
Using an angular momentum projected single particle basis, a pnQRPA approach is used to study the $2\nu\beta\beta$ properties of ten isotopes, exhibiting various quadrupole deformations. The mother and daughter nuclei exhibit different quadrupole deformations. Since the projected basis enables a unified description of deformed and spherical nuclei, situations where the nuclei involved in the double beta decay process are both spherical, both deformed or one spherical and another deformed, can be treated through a sole formalism. Dependence of single $\beta^-$ and $\beta^+$ strength distribution on atomic mass number and nuclear deformation is analyzed. For the double beta decay process, the Gamow-Teller transition amplitudes and half lives are calculated. Results are compared with the experimental data as well as with the predictions of other theoretical approaches. The agreement between the present results and experimental data is fairly good.
Escuderos Alberto
Raduta A. A.
Raduta C. M.
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