A1 Journal article (refereed)
Search for the double-beta decay of 82Se to the excited states of 82Kr with NEMO-3 (2020)
NEMO-3 Collaboration. (2020). Search for the double-beta decay of 82Se to the excited states of 82Kr with NEMO-3. Nuclear Physics A, 996, Article 121701. https://doi.org/10.1016/j.nuclphysa.2020.121701
JYU authors or editors
Publication details
All authors or editors: NEMO-3 Collaboration
Journal or series: Nuclear Physics A
ISSN: 0375-9474
eISSN: 1873-1554
Publication year: 2020
Volume: 996
Article number: 121701
Publisher: Elsevier
Publication country: Netherlands
Publication language: English
DOI: https://doi.org/10.1016/j.nuclphysa.2020.121701
Publication open access: Not open
Publication channel open access:
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/73930
Web address of parallel published publication (pre-print): https://arxiv.org/abs/2001.06388
Abstract
The double-beta decay of 82Se to the 0+1 excited state of 82Kr has been studied with the NEMO-3 detector using 0.93 kg of enriched 82Se measured for 4.75 y, corresponding to an exposure of 4.42 kg y. A dedicated analysis to reconstruct the gamma-rays has been performed to search for events in the 2e2g channel. No evidence of a 2nbb decay to the 0+1 state has been observed and a limit of T2n 1/2(82Se; 0+gs -> 0+1) > 1.3 1021 y at 90% CL has been set. Concerning the 0nbb decay to the 0+1 state, a limit for this decay has been obtained with T0n 1/2(82Se; 0+g s -> 0+1) > 2.3 1022 y at 90% CL, independently from the 2nbb decay process. These results are obtained for the first time with a tracko-calo detector, reconstructing every particle in the final state.
Keywords: nuclear physics; neutrinos
Free keywords: double beta decay; neutrino; 82Se; excited state
Contributing organizations
Ministry reporting: Yes
Reporting Year: 2020
JUFO rating: 1