Half-life of Ge71 and the gallium anomaly

Le résumé fourni par la source

Several past experiments such as SAGE, GALLEX, and BEST reported lower than expected neutrino capture rates on ${}^{71}$Ga. The origin of this so-called ``gallium anomaly'' could potentially indicate new neutrino physics, unless there was a more mundane explanation. Because the measured half-life of the electron-capture decay of ${}^{71}$Ge can be used to calculate the neutrino-capture cross section on ${}^{71}$Ga, the authors carried out three separate measurements to determine the half-life of ${}^{71}$Ge with high precision. Their new result of $11.468\ifmmode\pm\else\textpm\fi{}0.008$ days for the ${}^{71}$Ge half-life is consistent with the currently accepted value, but significantly more precise. It rules out an unexpectedly long ${}^{71}$Ge half-life as a potential explanation of the puzzling anomaly, leaving the anomaly's origin an open question.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.