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Armengaud, E.; Augier, C.; Barabash, A. S.; Bellini, F.; Benato, G.; Benoît, A.; Beretta, M.; Bergé, L.; Billard, J.; Borovlev, Yu. A.; Bourgeois, Ch; Briere, M.; Brudanin, V. B.; Camus, P.; Cardani, L.; Casali, N.; Cazes, A.; Chapellier, M.; Charlieux, F.; de Combarieu, M.; Dafinei, I.; Danevich, F. A.; De Jesus, M.; Dumoulin, L.; Eitel, K.; Elkhoury, E.; Ferri, F.; Fujikawa, B. K.; Gascon, J.; Gironi, L.; Giuliani, A.; Grigorieva, V. D.; Gros, M.; Guerard, E.; Helis, D. L.; Huang, H. Z.; Huang, R.; Johnston, J.; Juillard, A.; Khalife, H.; Kleifges, M.; Kobychev, V. V.; Kolomensky, Yu. G.; Konovalov, S. I.; Leder, A.; Loaiza, P.; Ma, L.; Makarov, E. P.; de Marcillac, P.; Marini, L.; Marnieros, S.; Misiak, D.; Navick, X. -F.; Nones, C.; Novati, V.; Olivieri, E.; Ouellet, J. L.; Pagnanini, L.; Pari, P.; Pattavina, L.; Paul, B.; Pavan, M.; Peng, H.; Pessina, G.; Pirro, S.; Poda, D. V.; Polischuk, O. G.; Previtali, E.; Redon, Th; Rozov, S.; Rusconi, C.; Sanglard, V.; Schäffner, K.; Schmidt, B.; Shen, Y.; Shlegel, V. N.; Siebenborn, B.; Singh, V.; Sorbino, S.; Tomei, C.; Tretyak, V. I.; Umatov, V. I.; Vagneron, L.; Velázquez, M.; Weber, M.; Welliver, B.; Winslow, L.; Xue, M.; Yakushev, E.; Zolotarova, A. S.
The European physical journal. C, Particles and fields, 2020/1, Letnik: 80, Številka: 1Journal Article
CUPID-Mo is a bolometric experiment to search for neutrinoless double-beta decay ( 0 ν β β ) of 100 Mo . In this article, we detail the CUPID-Mo detector concept, assembly and installation in the Modane underground laboratory, providing results from the first datasets. The CUPID-Mo detector consists of an array of 20 100 Mo -enriched 0.2 kg Li 2 MoO 4 crystals operated as scintillating bolometers at ∼ 20 mK . The Li 2 MoO 4 crystals are complemented by 20 thin Ge optical bolometers to reject α events by the simultaneous detection of heat and scintillation light. We observe a good detector uniformity and an excellent energy resolution of 5.3 keV (6.5 keV) FWHM at 2615 keV, in calibration (physics) data. Light collection ensures the rejection of α particles at a level much higher than 99.9% – with equally high acceptance for γ / β events – in the region of interest for 100 Mo 0 ν β β . We present limits on the crystals’ radiopurity: ≤ 3 μ Bq/kg of 226 Ra and ≤ 2 μ Bq/kg of 232 Th . We discuss the science reach of CUPID-Mo, which can set the most stringent half-life limit on the 100 Mo 0 ν β β decay in half-a-year’s livetime. The achieved results show that CUPID-Mo is a successful demonstrator of the technology developed by the LUMINEU project and subsequently selected for the CUPID experiment, a proposed follow-up of CUORE, the currently running first tonne-scale bolometric 0 ν β β experiment.
