Q value and half-life of double-electron capture in 184Os

C. Smorra, T. R. Rodríguez, T. Beyer, K. Blaum, M. Block, Ch E. Düllmann, K. Eberhardt, M. Eibach, S. Eliseev, K. Langanke, G. Martínez-Pinedo, Sz Nagy, W. Nörtershäuser, D. Renisch, V. M. Shabaev, I. I. Tupitsyn, N. A. Zubova

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Abstract

184Os has been excluded as a promising candidate for the search of neutrinoless double-electron capture. High-precision mass measurements with the Penning-trap mass spectrometer TRIGA-TRAP result in a marginal resonant enhancement with Δ=-8.89(58) keV excess energy to the 1322.152(22) keV 0+ excited state in 184W. State-of-the-art energy density functional calculations are applied for the evaluation of the nuclear matrix elements to the excited states predicting a strong suppression due to the large deformation of mother and daughter states. The half-life of the transition exceeds T 1/2(184Os)≥1.3×1029 yr for an effective neutrino mass of 1 eV.

Original languageEnglish
Article number044604
JournalPhysical Review C - Nuclear Physics
Volume86
Issue number4
DOIs
Publication statusPublished - Oct 1 2012

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Smorra, C., Rodríguez, T. R., Beyer, T., Blaum, K., Block, M., Düllmann, C. E., Eberhardt, K., Eibach, M., Eliseev, S., Langanke, K., Martínez-Pinedo, G., Nagy, S., Nörtershäuser, W., Renisch, D., Shabaev, V. M., Tupitsyn, I. I., & Zubova, N. A. (2012). Q value and half-life of double-electron capture in 184Os. Physical Review C - Nuclear Physics, 86(4), [044604]. https://doi.org/10.1103/PhysRevC.86.044604