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Search for tri-nucleon decays of Ge in GERDA. | LitMetric

We search for tri-nucleon decays of Ge in the dataset from the GERmanium Detector Array (GERDA) experiment. Decays that populate excited levels of the daughter nucleus above the threshold for particle emission lead to disintegration and are not considered. The ppp-, ppn-, and pnn-decays lead to Cu, Zn, and Ga nuclei, respectively. These nuclei are unstable and eventually proceed by the beta decay of Ga to Ge (stable). We search for the Ga decay exploiting the fact that it dominantly populates the 66.7 keV Ga state with half-life of 0.5 s. The nnn-decays of Ge that proceed via Ge are also included in our analysis. We find no signal candidate and place a limit on the sum of the decay widths of the inclusive tri-nucleon decays that corresponds to a lower lifetime limit of 1.210 yr  (90% credible interval). This result improves previous limits for tri-nucleon decays by one to three orders of magnitude.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10477131PMC
http://dx.doi.org/10.1140/epjc/s10052-023-11862-8DOI Listing

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