AZZOLINI, O.; BEEMAN, J.W.; BELLINI, F.; BERETTA, M.; BIASSONI, M.; BROFFERIO, C.; BUCCI, C.; CAPELLI, S.; CARDANI, L.; CARNITI, P.; CASALI, N.; CHIESA, D.; CLEMENZA, M.; CREMONESI, O.; CRUCIANI, A.; DAFINEI, I.; DI DOMIZIO, S.; FERRONI, F.; GIRONI, L.; GIULIANI, A.; GORLA, P.; GOTTI, C.; KEPPEL, G.; MARTINEZ, M.; MORGANTI, S.; NAGORNY, S.; NASTASI, M.; NISI, S.; NONES, C.; ORLANDI, D.; PAGNANINI, L.; PALLAVICINI, M.; PATTAVINA, L.; PAVAN, M.; PESSINA, G.; PETTINACCI, V.; PIRRO, S.; POZZI, S.; PREVITALI, E.; PUIU, A.; RUSCONI, C.; SCHAFFNER, K.; TOMEI, C.; VIGNATI, M.; ZOLOTAROVA, C.

doi:10.1016/j.nima.2019.162441

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Nucl.Instrum.Meth.A, Nucl.Instrum.Meth.A, 2019-02-18, Vienna. 2020, vol. 958, p. 162441

Résumé en anglais

CUPID-0 is the first large mass neutrino-less double beta decay ( 0νββ ) experiment based on cryogenic calorimeters with dual read-out of light and heat for background rejection. The detector assembly, consisting of 26 ZnSe crystals, 2 natural and 24 enriched at 95% in 82 Se, all coupled with bolometric light detectors, has been constructed respecting very strict protocols and procedures, from the material selection during crystal growth to the new and innovative detector framework, in the attempt to achieve the best performance of the array. The successful construction of the detector lead to promising preliminary results, here presented. The array is in fact taking data underground at LNGS (Italy) since March 2017 and the particle identification, enabled by the light read-out, provides an unprecedented background level, for cryogenic calorimeters, of only 3.2 counts keV−1t−1yr−1 in the region of interest of the 0νββ search for 82 Se, namely around 3 MeV.< Réduire

Mots clés en anglais

Neutrino-less double beta decay

Cryogenic detectors

Scintillation

Alpha background

CUPID

activity report

calorimeter: cryogenics

double-beta decay: (0neutrino)

background

scintillation counter: crystal

zinc

selenium

performance

Gran Sasso

bolometer

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CUPID-0: A double-readout cryogenic detector for Double Beta Decay search

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