Arnold, R;
Augier, C;
Barabash, AS;
Basharina-Freshville, A;
Blondel, S;
Blot, S;
Bongrand, M;
... Tretyak, VI; + view all
(2020)
Search for the double-beta decay of 82Se to the excited states of 82Kr with NEMO-3.
Nuclear Physics A
, 996
, Article 121701. 10.1016/j.nuclphysa.2020.121701.
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Abstract
The double-beta decay of 82Se to the 01+ 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 γ-rays has been performed to search for events in the 2e2γ channel. No evidence of a 2νββ decay to the 01+ state has been observed and a limit of T1/22ν(Se82,0gs+→01+)>1.3×1021y at 90% CL has been set. Concerning the 0νββ decay to the 01+ state, a limit for this decay has been obtained with T1/20ν(Se82,0gs+→01+)>2.3×1022y at 90% CL, independently from the 2νββ decay process. These results are obtained for the first time with a tracko-calo detector, reconstructing every particle in the final state.
| Type: | Article |
|---|---|
| Title: | Search for the double-beta decay of 82Se to the excited states of 82Kr with NEMO-3 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.nuclphysa.2020.121701 |
| Publisher version: | https://doi.org/10.1016/j.nuclphysa.2020.121701 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Double beta decay, Neutrino, 82Se, Excited state |
| 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-pp.ucl.ac.uk/id/eprint/10092440 |
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