Development of100Mo -containing scintillating bolometers for a high-sensitivity neutrinoless double-beta decay search

Armengaud, E.; Augier, C.; Barabash, A. S.; Beeman, J. W.; Bekker, T. B.; Bellini, F.; Benoît, A.; Bergé, L.; Bergmann, T.; Billard, J.; Boiko, R. S.; Broniatowski, A.; Brudanin, V.; Camus, P.; Capelli, S.; Cardani, L.; Casali, N.; Cazes, A.; Chapellier, M.; Charlieux, F.; Chernyak, D. M.; de Combarieu, M.; Coron, N.; Danevich, F. A.; 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, V. D.; Gros, M.; Hehn, L.; Hervé, S.; Humbert, V.; Ivannikova, N. V.; Ivanov, I. M.; Jin, Y.; Juillard, A.; Kleifges, M.; Kobychev, V. V.; Konovalov, S. I.; Koskas, F.; Kozlov, V.; Kraus, H.; Kudryavtsev, V. A.; Laubenstein, M.; Sueur, H. Le; Loidl, M.; Magnier, P.; Makarov, E. P.; Mancuso, M.; de Marcillac, P.; Marnieros, S.; Marrache-Kikuchi, C.; Nagorny, S.; Navick, X. -F.; Nikolaichuk, M. O.; 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, D. V.; Queguiner, E.; Redon, T.; Rodrigues, M.; Rozov, S.; Rusconi, C.; Sanglard, V.; Schäffner, K.; Scorza, S.; Shlegel, V. N.; Siebenborn, B.; Strazzer, O.; Tcherniakhovski, D.; Tomei, C.; Tretyak, V. I.; Umatov, V. I.; Vagneron, L.; Vasiliev, Ya. V.; Velázquez, M.; Vignati, M.; Weber, M.; Yakushev, E.; Zolotarova, A. S.

doi:10.1140/epjc/s10052-017-5343-2

This paper reports on the development of a tech- nology involving 100 Mo-enriched scintillating bolometers, compatible with the goals of CUPID, a proposed next- generation bolometric experiment to search for neutrinoless double-beta decay. Large mass (∼ 1 kg), high optical qual- ity, radiopure 100Mo-containing zinc and lithium molybdate crystals have been produced and used to develop high perfor- mance single detector modules based on 0.2–0.4 kg scintil- lating bolometers. In particular, the energy resolution of the lithium molybdate detectors near the Q-value of the double- beta transition of 100Mo (3034 keV) is 4–6 keV FWHM. The rejection of the α-induced dominant background above 2.6 MeV is better than 8σ . Less than 10 μBq/kg activity of 232 Th (228 Th) and 226 Ra in the crystals is ensured by boule recrystallization. The potential of 100 Mo-enriched scintillat- ing bolometers to perform high sensitivity double-beta decay searches has been demonstrated with only 10 kg×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.)] × 1018 years. Both crystal- lization 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.

Development of100Mo -containing scintillating bolometers for a high-sensitivity neutrinoless double-beta decay search / Armengaud, E.; Augier, C.; Barabash, A. S.; Beeman, J. W.; Bekker, T. B.; Bellini, F.; Benoît, A.; Bergé, L.; Bergmann, T.; Billard, J.; Boiko, R. S.; Broniatowski, A.; Brudanin, V.; Camus, P.; Capelli, S.; Cardani, L.; Casali, N.; Cazes, A.; Chapellier, M.; Charlieux, F.; Chernyak, D. M.; de Combarieu, M.; Coron, N.; Danevich, F. A.; 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, V. D.; Gros, M.; Hehn, L.; Hervé, S.; Humbert, V.; Ivannikova, N. V.; Ivanov, I. M.; Jin, Y.; Juillard, A.; Kleifges, M.; Kobychev, V. V.; Konovalov, S. I.; Koskas, F.; Kozlov, V.; Kraus, H.; Kudryavtsev, V. A.; Laubenstein, M.; Sueur, H. Le; Loidl, M.; Magnier, P.; Makarov, E. P.; Mancuso, M.; de Marcillac, P.; Marnieros, S.; Marrache-Kikuchi, C.; Nagorny, S.; Navick, X. -F.; Nikolaichuk, M. O.; 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, D. V.; Queguiner, E.; Redon, T.; Rodrigues, M.; Rozov, S.; Rusconi, C.; Sanglard, V.; Schäffner, K.; Scorza, S.; Shlegel, V. N.; Siebenborn, B.; Strazzer, O.; Tcherniakhovski, D.; Tomei, C.; Tretyak, V. I.; Umatov, V. I.; Vagneron, L.; Vasiliev, Ya. V.; Velázquez, M.; Vignati, M.; Weber, M.; Yakushev, E.; Zolotarova, A. S.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 77:11(2017). [10.1140/epjc/s10052-017-5343-2]