Search for neutrinoless double-electron capture of Dy 156

Published

Journal Article

© 2015 American Physical Society. Background: Multiple large collaborations are currently searching for neutrinoless double-β decay, with the ultimate goal of differentiating the Majorana-Dirac nature of the neutrino. Purpose: Investigate the feasibility of resonant neutrinoless double-electron capture, an experimental alternative to neutrinoless double-β decay. Method: Two clover germanium detectors were operated underground in coincidence to search for the de-excitation γ rays of Gd156 following the neutrinoless double-electron capture of Dy156. 231.95 d of data were collected at the Kimballton underground research facility with a 231.57 mg enriched Dy156 sample. Results: No counts were seen above background and half-life limits are set at O(1016-1018) yr for the various decay modes of Dy156. Conclusion: Low background spectra were efficiently collected in the search for neutrinoless double-electron capture of Dy156, although the low natural abundance and associated lack of large quantities of enriched samples hinders the experimental reach.

Full Text

Duke Authors

Cited Authors

  • Finch, SW; Tornow, W

Published Date

  • December 31, 2015

Published In

Volume / Issue

  • 92 / 6

Electronic International Standard Serial Number (EISSN)

  • 1089-490X

International Standard Serial Number (ISSN)

  • 0556-2813

Digital Object Identifier (DOI)

  • 10.1103/PhysRevC.92.065503

Citation Source

  • Scopus