A CUPID (Li2MoO4)-Mo-100 scintillating bolometer tested in the CROSS underground facility
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A CUPID (Li2MoO4)-Mo-100 scintillating bolometer tested in the CROSS underground facility

  • Author(s): Armatol, A;
  • Armengaud, E;
  • Armstrong, W;
  • Augier, C;
  • III, Avignone FT;
  • Azzolini, O;
  • Bandac, IC;
  • Barabash, AS;
  • Bari, G;
  • Barresi, A;
  • Baudin, D;
  • Bellini, F;
  • Benato, G;
  • Beretta, M;
  • Berge, L;
  • Bourgeois, Ch;
  • Biassoni, M;
  • Billard, J;
  • Boldrini, V;
  • Branca, A;
  • Brofferio, C;
  • Bucci, C;
  • Calvo-Mozota, JM;
  • Camilleri, J;
  • Candela, A;
  • Capelli, S;
  • Cappelli, L;
  • Cardani, L;
  • Carniti, P;
  • Casali, N;
  • Cazes, A;
  • Celi, E;
  • Chang, C;
  • Chapellier, M;
  • Charrier, A;
  • Chiesa, D;
  • Clemenza, M;
  • Colantoni, I;
  • Collamati, F;
  • Copello, S;
  • Cremonesi, O;
  • Creswick, RJ;
  • Cruciani, A;
  • D'Addabbo, A;
  • D'Imperio, G;
  • Dafinei, I;
  • Danevich, FA;
  • de Combarieu, M;
  • De Deo, M;
  • De Jesus, M;
  • de Marcillac, P;
  • Dell'Oro, S;
  • Di Domizio, S;
  • Dompe, V;
  • Drobizhev, A;
  • Dumoulin, L;
  • Fantini, G;
  • Faverzani, M;
  • Ferri, E;
  • Ferri, F;
  • Ferroni, F;
  • Figueroa-Feliciano, E;
  • Formaggio, J;
  • Franceschi, A;
  • Fu, C;
  • Fu, S;
  • Fujikawa, BK;
  • Gascon, J;
  • Giachero, A;
  • Gironi, L;
  • Giuliani, A;
  • Gorla, P;
  • Gotti, C;
  • Gras, P;
  • Gros, M;
  • Guerard, E;
  • Gutierrez, TD;
  • Han, K;
  • Hansen, EV;
  • Heeger, KM;
  • Helis, DL;
  • Huang, HZ;
  • Huang, RG;
  • Ianni, A;
  • Imbert, L;
  • Johnston, J;
  • Juillard, A;
  • Karapetrov, G;
  • Keppel, G;
  • Khalife, H;
  • Kobychev, VV;
  • Kolomensky, Yu G;
  • Konovalov, SI;
  • Liu, Y;
  • Loaiza, P;
  • Ma, L;
  • Madhukuttan, M;
  • Mancarella, F;
  • Mariam, R;
  • Marini, L;
  • Marnieros, S;
  • Martinez, M;
  • Maruyama, RH;
  • Mauri, B;
  • Mayer, D;
  • Mei, Y;
  • Milana, S;
  • Misiak, D;
  • Napolitano, T;
  • Nastasi, M;
  • Navick, X-F;
  • Nikkel, J;
  • Nipoti, R;
  • Nisi, S;
  • Nones, C;
  • Norman, EB;
  • Novosad, V;
  • Nutini, I;
  • O'Donnell, T;
  • Olivier, G;
  • Olivieri, E;
  • Oriol, C;
  • Ouellet, JL;
  • Pagan, S;
  • Pagliarone, C;
  • Pagnanini, L;
  • Pari, P;
  • Pattavina, L;
  • Paul, B;
  • Pavan, M;
  • Peng, H;
  • Pessina, G;
  • Pettinacci, V;
  • Pira, C;
  • Pirro, S;
  • Poda, DV;
  • Polakovic, T;
  • Polischuk, OG;
  • Pozzi, S;
  • Previtali, E;
  • Puiu, A;
  • Ressa, A;
  • Reynet, D;
  • Rizzoli, R;
  • Rosenfeld, C;
  • Sanglard, V;
  • Scarpaci, JA;
  • Schmidt, B;
  • Sharma, V;
  • Shlegel, VN;
  • Singh, V;
  • Sisti, M;
  • Speller, D;
  • Surukuchi, PT;
  • Taffarello, L;
  • Tellier, O;
  • Tomei, C;
  • Tretyak, VI;
  • Tsymbaliuk, A;
  • Velazquez, M;
  • Vetter, KJ;
  • Wagaarachchi, SL;
  • Wang, G;
  • Wang, L;
  • Welliver, B;
  • Wilson, J;
  • Wilson, K;
  • Winslow, LA;
  • Xue, M;
  • Yan, L;
  • Yang, J;
  • Yefremenko, V;
  • Yumatov, VI;
  • Zarytskyy, MM;
  • Zhang, J;
  • Zolotarova, AS;
  • Zucchelli, S;
  • Collaboration, CUPID;
  • Collaboration, CUPID;
  • Collaboration, CROSS
  • et al.
Abstract

A scintillating bolometer based on a large cubic Li$_{2}$$^{100}$MoO$_4$ crystal (45 mm side) and a Ge wafer (scintillation detector) has been operated in the CROSS cryogenic facility at the Canfranc underground laboratory in Spain. The dual-readout detector is a prototype of the technology that will be used in the next-generation $0\nu2\beta$ experiment CUPID. The measurements were performed at 18 and 12 mK temperature in a pulse tube dilution refrigerator. This setup utilizes the same technology as the CUORE cryostat that will host CUPID and so represents an accurate estimation of the expected performance. The Li$_{2}$$^{100}$MoO$_4$ bolometer shows a high energy resolution of 6 keV FWHM at the 2615 keV $\gamma$ line. The detection of scintillation light for each event triggered by the Li$_{2}$$^{100}$MoO$_4$ bolometer allowed for a full separation ($\sim$8$\sigma$) between $\gamma$($\beta$) and $\alpha$ events above 2 MeV. The Li$_{2}$$^{100}$MoO$_4$ crystal also shows a high internal radiopurity with $^{228}$Th and $^{226}$Ra activities of less than 3 and 8 $\mu$Bq/kg, respectively. Taking also into account the advantage of a more compact and massive detector array, which can be made of cubic-shaped crystals (compared to the cylindrical ones), this test demonstrates the great potential of cubic Li$_{2}$$^{100}$MoO$_4$ scintillating bolometers for high-sensitivity searches for the $^{100}$Mo $0\nu2\beta$ decay in CROSS and CUPID projects.

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