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

Abstract

Os-184 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 resulted in a marginal resonant enhancement with = -8.89(58) keV excess energy to the 1322.152(22) keV 0+ excited state in W-184. 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 in Os-184 exceeds T_{1/2} > 1.3 10^{29} years for an effective neutrino mass of 1 eV.

arXiv commentaccepted in Phys. Rev. C

References in corpus (8)

• Energy density functional study of nuclear matrix elements for neutrinoless $\beta \beta$ decay
• The 0nbb-decay nuclear matrix elements with self-consistent short-range correlations
• The Ramsey method in high-precision mass spectrometry with Penning traps: Experimental results
• TRIGA-SPEC: A setup for mass spectrometry and laser spectroscopy at the research reactor TRIGA Mainz
• Resonance enhancement of neutrinoless double electron capture
• On the impact of large amplitude pairing fluctuations on nuclear spectra
• Calculation of nuclear matrix elements in neutrinoless double electron capture
• Direct mass measurements of cadmium and palladium isotopes and their double-beta transition Q-values

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• First search for double-beta decay of 184Os and 192Os
• New experimental limits on double-beta decay of osmium