Nuclear structure calculations for two-neutrino double-beta decay
Abstract
We study the two-neutrino double-beta decay in 76Ge, 116Cd, 128Te, 130Te, and 150Nd, as well as the two Gamow-Teller branches that connect the double-beta decay partners with the states in the intermediate nuclei. We use a theoretical microscopic approach based on a deformed selfconsistent mean field with Skyrme interactions including pairing and spin-isospin residual forces, which are treated in a proton-neutron quasiparticle random-phase approximation. We compare our results for Gamow-Teller strength distributions with experimental information obtained from charge-exchange reactions. We also compare our results for the two-neutrino double-beta decay nuclear matrix elements with those extracted from the measured half-lives. Both single-state and low-lying-state dominance hypotheses are analyzed theoretically and experimentally making use of recent data from charge-exchange reactions and beta decay of the intermediate nuclei.
Cite
@article{arxiv.1609.05648,
title = {Nuclear structure calculations for two-neutrino double-beta decay},
author = {P. Sarriguren and O. Moreno and E. Moya de Guerra},
journal= {arXiv preprint arXiv:1609.05648},
year = {2017}
}
Comments
11 pages, 6 figures. arXiv admin note: text overlap with arXiv:1502.05889