1. Development of 100Mo -containing scintillating bolometers for a high-sensitivity neutrinoless double-beta decay search
- Author
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Armengaud, E, Augier, C, Barabash, AS, Beeman, JW, Bekker, TB, Bellini, F, Benoît, A, Bergé, L, Bergmann, T, Billard, J, Boiko, RS, Broniatowski, A, Brudanin, V, Camus, P, Capelli, S, Cardani, L, Casali, N, Cazes, A, Chapellier, M, Charlieux, F, Chernyak, DM, de Combarieu, M, Coron, N, Danevich, FA, Dafinei, I, Jesus, M De, Devoyon, L, Domizio, S Di, Dumoulin, L, Eitel, K, Enss, C, Ferroni, F, Fleischmann, A, Foerster, N, Gascon, J, Gastaldo, L, Gironi, L, Giuliani, A, Grigorieva, VD, Gros, M, Hehn, L, Hervé, S, Humbert, V, Ivannikova, NV, Ivanov, IM, Jin, Y, Juillard, A, Kleifges, M, Kobychev, VV, Konovalov, SI, Koskas, F, Kozlov, V, Kraus, H, Kudryavtsev, VA, Laubenstein, M, Sueur, H Le, Loidl, M, Magnier, P, Makarov, EP, Mancuso, M, de Marcillac, P, Marnieros, S, Marrache-Kikuchi, C, Nagorny, S, Navick, X-F, Nikolaichuk, MO, Nones, C, Novati, V, Olivieri, E, Pagnanini, L, Pari, P, Pattavina, L, Pavan, M, Paul, B, Penichot, Y, Pessina, G, Piperno, G, Pirro, S, Plantevin, O, Poda, DV, Queguiner, E, Redon, T, Rodrigues, M, Rozov, S, Rusconi, C, Sanglard, V, Schäffner, K, Scorza, S, Shlegel, VN, Siebenborn, B, Strazzer, O, Tcherniakhovski, D, Tomei, C, Tretyak, VI, Umatov, VI, Vagneron, L, Vasiliev, Ya V, Velázquez, M, Vignati, M, and Weber, M
- Subjects
Quantum Physics ,Particle and Plasma Physics ,Molecular ,Nuclear ,Atomic ,Nuclear & Particles Physics - Abstract
This paper reports on the development of a technology involving 100Mo -enriched scintillating bolometers, compatible with the goals of CUPID, a proposed next-generation bolometric experiment to search for neutrinoless double-beta decay. Large mass ( ∼1kg ), high optical quality, radiopure 100Mo -containing zinc and lithium molybdate crystals have been produced and used to develop high performance single detector modules based on 0.2-0.4kg scintillating bolometers. In particular, the energy resolution of the lithium molybdate detectors near the Q-value of the double-beta transition of 100Mo (3034keV) is 4-6keV FWHM. The rejection of the α -induced dominant background above 2.6MeV is better than 8σ . Less than 10μBq/kg activity of 232Th(228Th) and 226Ra in the crystals is ensured by boule recrystallization. The potential of 100Mo -enriched scintillating bolometers to perform high sensitivity double-beta decay searches has been demonstrated with only 10kg×d exposure: the two neutrino double-beta decay half-life of 100Mo has been measured with the up-to-date highest accuracy as T1/2 = [6.90 ± 0.15(stat.) ± 0.37(syst.)] ×1018years . Both crystallization and detector technologies favor lithium molybdate, which has been selected for the ongoing construction of the CUPID-0/Mo demonstrator, containing several kg of 100Mo .
- Published
- 2017