Bound-state double-$\beta$ decay
Abstract
We consider new modes of two-neutrino and neutrinoless double- decays in which one electron goes over to a continuous spectrum and the other occupies a vacant bound level of the daughter ion. We calculate the corresponding phase-space factors of the final states, estimate the partial decay rates, and derive the one- and two-electron energy spectra using relativistic many-electron wave functions of atoms provided by the multiconfiguration Dirac-Hartree-Fock package GRASP2K. While the bound-state neutrinoless double- decays are strongly suppressed, their two-neutrino counterparts can be observed in the next-generation double--decay experiments, most notably SuperNEMO.
Cite
@article{arxiv.1805.07815,
title = {Bound-state double-$\beta$ decay},
author = {A. Babič and D. Štefánik and M. I. Krivoruchenko and F. Šimkovic},
journal= {arXiv preprint arXiv:1805.07815},
year = {2018}
}
Comments
11 pages, 12 figures, 1 table; minor style corrections, accepted for publication in Phys. Rev. C