Calculation of nuclear matrix elements in neutrinoless double electron capture
Nuclear Theory
2015-06-04 v1 Nuclear Experiment
Abstract
We compute nuclear matrix elements for neutrinoless double electron capture on Gd, Er and W nuclei. Recent precise mass measurements for these nuclei have shown a large resonance enhancement factor that makes them the most promising candidates for observing this decay mode. We use an advanced energy density functional method which includes beyond mean-field effects such as symmetry restoration and shape mixing. Our calculations reproduce experimental charge radii and values predicting a large deformation for all these nuclei. This fact reduces significantly the values of the NMEs leading to half-lives larger than years for the three candidates.
Cite
@article{arxiv.1203.0989,
title = {Calculation of nuclear matrix elements in neutrinoless double electron capture},
author = {Tomas R. Rodriguez and Gabriel Martinez-Pinedo},
journal= {arXiv preprint arXiv:1203.0989},
year = {2015}
}