In this paper, an application of silicon drift detectors (SDDs) as photodetectors for large inorganic scintillators is presented. In particular, a 2.3× 2.3×1.5 cm3 CdWO4 crystal has been coupled to a 3×2 matrix of 8×8 mm2 SDDs both cooled at 125 K, obtaining a scintillation detector whose performances are tested by measuring the γ rays emitted by a 228Th source. The SDDs, characterized by high quantum efficiency and low electronic noise, are suitable candidates as photodetectors for high-resolution gamma-ray spectroscopy detectors. On the other hand, CdWO4 is an interesting crystal for the study of rare nuclear decays, such as the possible neutrinoless double beta decay (0ν β β) of 116Cd. With this prototype, a full-width at half-maximum resolution of 3.09 ± 0.05% at 2615 keV has been measured. This result provides a first validation of the application of this technology to rare event searches.
Butt, A., Fiorini, C., Beretta, M., Gironi, L., Capelli, S., Previtali, E., et al. (2018). Application of Silicon Drift Detectors for the Readout of a CdWO4 Scintillating Crystal. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 65(4), 1040-1046 [10.1109/TNS.2018.2810703].
Application of Silicon Drift Detectors for the Readout of a CdWO4 Scintillating Crystal
Beretta, M.;Gironi, L.;Capelli, S.;Previtali, E.;Sisti, M.
2018
Abstract
In this paper, an application of silicon drift detectors (SDDs) as photodetectors for large inorganic scintillators is presented. In particular, a 2.3× 2.3×1.5 cm3 CdWO4 crystal has been coupled to a 3×2 matrix of 8×8 mm2 SDDs both cooled at 125 K, obtaining a scintillation detector whose performances are tested by measuring the γ rays emitted by a 228Th source. The SDDs, characterized by high quantum efficiency and low electronic noise, are suitable candidates as photodetectors for high-resolution gamma-ray spectroscopy detectors. On the other hand, CdWO4 is an interesting crystal for the study of rare nuclear decays, such as the possible neutrinoless double beta decay (0ν β β) of 116Cd. With this prototype, a full-width at half-maximum resolution of 3.09 ± 0.05% at 2615 keV has been measured. This result provides a first validation of the application of this technology to rare event searches.
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