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arXiv · 2307.05353

New Measurements of $^{71}$Ge Decay: Impact on the Gallium Anomaly

J. I. Collar·S. G. Yoon
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Abstract

A dedicated high-statistics measurement of the $^{71}$Ge half-life is found to be in accurate agreement with an accepted value of 11.43$\pm$0.03 d, eliminating a recently proposed route to bypass the "gallium anomaly" affecting several neutrino experiments. Our data also severely constrain the possibility of $^{71}$Ge decay to low-energy excited levels of the $^{71}$Ga daughter nucleus as a solution to this puzzle. Additional unpublished measurements of this decay are discussed. Following the incorporation of this new information, the gallium anomaly survives with high statistical significance.

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J. I. Collar, S. G. Yoon. 2023-07-11. New Measurements of $^{71}$Ge Decay: Impact on the Gallium Anomaly. https://doi.org/10.1103/physrevc.108.l021602

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