New experimental limits on double-beta decay of osmium

Abstract

Double-beta processes in ${}^{184}$Os and ${}^{192}$Os were searched for over 15851 h at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N. by using a 118 g ultra-pure osmium sample installed on the endcap of a 112 cm${}^3$ ultra-low-background broad-energy germanium detector. New limits on double-electron capture and electron capture with positron emission in ${}^{184}$Os were set at the level of $\lim T_{1/2}\sim 10^{16}-10^{17}$ yr. In particular the $2\nu$2K and $2\nu$KL decays of ${}^{184}$Os to the ground state of ${}^{184}$W are restricted as $T_{1/2}\ge 3.0\times 10^{16}$ yr and $T_{1/2}\ge 2.0\times 10^{16}$ yr, respectively. A lower limit on the half-life for the double-beta decay of ${}^{192}$Os to the first excited level of ${}^{192}$Pt was set as $\lim T_{1/2}=2.0\times 10^{20}$ yr at 90\% C.L.

arXiv comment22 pages, 9 figures, 2 tables

References in corpus (19)

• A Unified Approach to the Classical Statistical Analysis of Small Signals
• Search for Majorana Neutrinos near the Inverted Mass Hierarchy Region with KamLAND-Zen
• Neutrinoless Double-Beta Decay: Status and Prospects
• Neutrinoless double beta decay: 2015 review
• Final Results of GERDA on the Search for Neutrinoless Double-$\beta$ Decay
• Nuclear matrix elements for double-β decay
• Neutrinoless Double Beta Decay and Physics Beyond the Standard Model
• The event generator DECAY4 for simulation of double beta processes and decay of radioactive nuclei
• Neutrinoless double beta decay and neutrino mass
• Neutrinoless Double-Beta Decay: a Probe of Physics Beyond the Standard Model
• Improved Limit on Neutrinoless Double-Beta Decay in ${}^{130}$Te with CUORE
• Resonance enhancement of neutrinoless double electron capture
• New Limit for Neutrinoless Double-Beta Decay of ${}^{100}$Mo from the CUPID-Mo Experiment
• Final result of CUPID-0 phase-I in the search for the ${}^{82}$Se Neutrinoless Double Beta Decay
• Neutrinoless Double-Electron Capture
• First search for double-beta decay of 184Os and 192Os
• A multi-isotope $0\nu 2\beta$ bolometric experiment
• Q value and half-life of double-electron capture in Os-184
• Search for alpha decay of naturally occurring osmium nuclides accompanied by gamma quanta

Cited by in corpus (1)

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