New results for double-beta decay of 100 Mo to excited final states of 100 Ru using the TUNL-ITEP apparatus


Journal Article

The coincidence detection efficiency of the TUNL-ITEP apparatus designed for measuring half-life times of two-neutrino double-beta (2 ν β β) decay transitions to excited final states in daughter nuclei has been measured with a factor of 2.4 improved accuracy. In addition, the previous measuring time of 455 days for the study of the 100Mo 2 ν β β decay to the first excited 01+ state in 100Ru has been increased by 450 days, and a new result (combined with the previous measurement obtained with the same apparatus) for this transition is presented: T1 / 2 = [5.5- 0.8+ 1.2 (stat) ± 0.3 (syst)] × 1020 yr. Measured 2 ν β β decay half-life times to excited states can be used to test the reliability of nuclear matrix element calculations needed for determining the effective neutrino mass from zero-neutrino double-beta decay data. We also present new limits for transitions to higher excited states in 100Ru which, if improved, may be of interest for more exotic conjectures, like a bosonic component to neutrino statistics. © 2009 Elsevier B.V. All rights reserved.

Full Text

Duke Authors

Cited Authors

  • Kidd, MF; Esterline, JH; Tornow, W; Barabash, AS; Umatov, VI

Published Date

  • April 15, 2009

Published In

Volume / Issue

  • 821 / 1-4

Start / End Page

  • 251 - 261

International Standard Serial Number (ISSN)

  • 0375-9474

Digital Object Identifier (DOI)

  • 10.1016/j.nuclphysa.2009.01.082

Citation Source

  • Scopus