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

Smorra, Christian; Rodríguez, T.R.; Beyer, Thomas; Blaum, Klaus; Block, Michael; Düllmann, Ch.E.; Eberhardt, Klaus; Eibach, Martin; Eliseev, Sergey; Langanke, K.; Martínez-Pinedo, G.; Nagy, Szilard; Nörtershäuser, W.; Renisch , Dennis; Shabaev, V.M.; Tupitsyn, I.I.; Zubova, N.A.

doi:10.1103/PhysRevC.86.044604

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

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Smorra, Christian
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Institut für Kernchemie, Johannes Gutenberg-Universität;
Fakultät für Physik und Astronomie, Ruprecht-Karls-Universität;

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Beyer, Thomas
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Fakultät für Physik und Astronomie, Ruprecht-Karls-Universität;

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Blaum, Klaus
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Fakultät für Physik und Astronomie, Ruprecht-Karls-Universität;

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Eliseev, Sergey
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Nagy, Szilard
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
GSI Helmholtzzentrum für Schwerionenforschung;

Renisch , Dennis
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Institut für Kernchemie, Johannes Gutenberg-Universität;

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http://link.aps.org/doi/10.1103/PhysRevC.86.044604
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1209.5174v1
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Citation

Smorra, C., Rodríguez, T., Beyer, T., Blaum, K., Block, M., Düllmann, C., et al. (2012). Q value and half-life of double-electron capture in ¹⁸⁴Os. Physical Review C, 86(4): 044604, pp. 1-5. doi:10.1103/PhysRevC.86.044604.

Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-F0B9-2

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.