A new investigation of half-lives for the decay modes of ${}^{50}$V

Abstract

A new search for the decay modes of the 4-fold forbidden non-unique decay of ${}^{50}$V has been performed at the Gran Sasso Underground Laboratory (LNGS). In total an exposure of 197 kg $\times$ d has been accumulated. The half-life for the electron capture into the first excited state of ${}^{50}$Ti has been measured with the highest precision to date as $2.67_{-0.18}^{+0.16}\times 10^{17}$ yr (68% C.I.) in which systematics uncertainties dominate. The search for the $\beta$-decay into the first excited state of ${}^{50}$Cr resulted in a lower limit of $1.9\times 10^{19}$ yr (90% C.I.), which is an improvement of almost one order of magnitude compared to existing results. The sensitivity of the new measurement is now in the region of theoretical predictions.

References in corpus (2)

• \textsc{MaGe} - a {\sc Geant4}-based Monte Carlo Application Framework for Low-background Germanium Experiments
• Precision half-life measurement of the 4-fold forbidden electron capture of V-50

Cited by in corpus (5)

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• Array of Cryogenic Calorimeters to Evaluate the Spectral Shape of forbidden $\beta$-decays: the ACCESS project
• Search for Electron Capture in ${}^{176}$Lu with LYSO scintillator
• Development of cryogenic calorimeters to measure the spectral shape of In-115 beta decay