Agostini, M;
Alexander, A;
Araujo, G;
Bakalyarov, AM;
Balata, M;
Barabanov, I;
Baudis, L;
... GERDA, collaboration; + view all
(2023)
Search for tri-nucleon decays of ^{76}Ge in GERDA.
The European Physical Journal C
, 83
(9)
, Article 778. 10.1140/epjc/s10052-023-11862-8.
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Abstract
We search for tri-nucleon decays of 76Ge 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 73Cu, 73Zn, and 73Ga nuclei, respectively. These nuclei are unstable and eventually proceed by the beta decay of 73Ga to 73Ge (stable). We search for the 73Ga decay exploiting the fact that it dominantly populates the 66.7 keV 73mGa state with half-life of 0.5 s. The nnn-decays of 76Ge that proceed via 73mGe 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 1.2×1026 yr (90% credible interval). This result improves previous limits for tri-nucleon decays by one to three orders of magnitude.
| Type: | Article |
|---|---|
| Title: | Search for tri-nucleon decays of ^{76}Ge in GERDA |
| Location: | France |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1140/epjc/s10052-023-11862-8 |
| Publisher version: | https://doi.org/10.1140/epjc/s10052-023-11862-8 |
| Language: | English |
| Additional information: | © 2023 Springer Nature. This article is licensed under a Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10176498 |
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