Nuclear deformation and the two-neutrino double-beta decay in Xe-124,Xe-126, Te-128,Te-130, Ba-130,Ba-132 and Nd-150 isotopes

摘要

The two-neutrino double-beta decay of (124,126) Xe, Te-128,Te-130, Ba-130,Ba-132 and Nd-150 isotopes is studied in the Projected Hartree-Fock-Bogoliubov (PHFB) model. Theoretical 2 nu beta(-)beta(-) half-lives of Te-128,Te-130, and Nd-150 isotopes, and 2 nu beta(+) beta(+), 2 nu beta(+) EC and 2 nu ECEC for Xe-124,Xe-126 and Ba-130,Ba-132 nuclei are presented. Calculated quadrupolar transition probabilities B(E2: 0(+) -> 2(+)), static quadrupole moments and g-factors in the parent and daughter nuclei reproduce the experimental information, validating the reliability of the model wave functions. The anticorrelation between nuclear deformation and the nuclear transition matrix element M-2 nu is confirmed.