Double electron capture searches in ${}^{74}$Se

Abstract

A search for various double electron capture modes of ${}^{74}$Se has been performed using an ultralow background Ge-detector in the Felsenkeller laboratory, Germany. Especially for the potentially resonant transition into the 1204.2 keV excited state of ${}^{74}$Ge a lower half-life limit of $0.70\cdot 10^{19}$ yr (90% credibility) has been obtained. Serious concerns are raised about the validity of obtained ${}^{74}$Se limits in some recent publications.

References in corpus (7)

• Double Beta Decay, Majorana Neutrinos, and Neutrino Mass
• Limit on Neutrinoless ββ Decay of Xe-136 from the First Phase of KamLAND-Zen and Comparison with the Positive Claim in Ge-76
• \textsc{MaGe} - a {\sc Geant4}-based Monte Carlo Application Framework for Low-background Germanium Experiments
• Leptogenesis in the Universe
• Search for ${\beta }^{+}$EC and ECEC processes in ${}^{74}$Se
• Neutrinoless double electron capture
• A search for double-electron capture in 74Se using coincidence/anticoincidence gamma-ray spectrometry

Cited by in corpus (4)

• Neutrinoless Double-Electron Capture
• Improved search for two-neutrino double electron capture on ${}^{124}$Xe and ${}^{126}$Xe using particle identification in XMASS-I
• Improved limits on ${\beta }^{+}$EC and ECEC processes in ${}^{74}$Se
• Updated and novel limits on double beta decay and dark matter-induced processes in platinum