We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Rejection of randomly coinciding events in Li<sub>2</sub><sup>100</sup> MoO<sub>4</sub> scintillating bolometers using light detectors based on the Neganov-Luke effect.
- Authors
Chernyak, D. M.; Danevich, F. A.; Dumoulin, L.; Giuliani, A.; Mancuso, M.; de Marcillac, P.; Marnieros, S.; Nones, C.; Olivieri, E.; Poda, D. V.; Tretyak, V. I.
- Abstract
Random coincidences of nuclear events can be one of the main background sources in low-temperature calorimetric experiments looking for neutrinoless doublebeta decay, especially in those searches based on scintillating bolometers embedding the promising double-beta candidate 100 Mo, because of the relatively short half-life of the twoneutrino double-beta decay of this nucleus. We show in this work that randomly coinciding events of the two-neutrino double-beta decay of 100 Mo in enriched Li2100 MoO4 detectors can be effectively discriminated by pulse-shape analysis in the light channel if the scintillating bolometer is provided with a Neganov-Luke light detector, which can improve the signal-to-noise ratio by a large factor, assumed here at the level of~750 on the basis of preliminary experimental results obtained with these devices. The achieved pile-up rejection efficiency results in a very low contribution, of the order of ~6 × 10-5 counts/(keV·kg·y), to the background counting rate in the region of interest for a large volume (~90 cm³) Li2100 MoO4 detector. This background level is very encouraging in view of a possible use of the Li2100 MoO4 solution for a bolometric tonne-scale next-generation experiment as that proposed in the CUPID project.
- Subjects
BOLOMETERS; SCINTILLATORS; LITHIUM spectra; PHOTODETECTORS; DOUBLE beta decay; NEUTRINO scattering; MOLYBDENUM oxides
- Publication
European Physical Journal C -- Particles & Fields, 2017, Vol 77, Issue 1, p1
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-016-4565-z