We present a SiPM-based gamma-ray detection module, which allows to read large LaBr3:Ce cylindrical crystals (diameter > 1'), typically adopted in nuclear physics experiments, with spectroscopic performances similar to those achievable with PMTs. High-Density SiPM technology for Near UltraViolet and blue light detection (NUV-HD, Fondazione Bruno Kessler, Italy) were used. These SiPMs show high Photo Detection Efficiency (PDE = 45% at 380 nm) and low Dark Count Rate (DCR < 100 kHz/mm2). The photodetector prototype has a modular structure based on an array of 5 × 6 SiPMs, each one having an active area of 6 × 6 mm2 and 30 μm microcells. This array was used for 1' scintillator readout and it was assembled in 2 × 2 planar format for the 2' scintillator readout. The spectroscopic measurements presented in this work were performed with 2' × 2' LaBr3:Ce irradiated with 57C, 133Ba, 137Cs and 60Co calibration sources. An energy resolution of 3.19 ± 0.01% was achieved at 662 keV with 2' LaBr3:Ce. The same crystal was tested with a Super Bialkali PMT (Hamamatsu R6233-100) showing a similar energy resolution of 3.07 ± 0.03% at 662 keV. Therefore, these results support the equivalence between SiPM and PMT for high-resolution spectroscopy.
A SiPM-Based Detection Module for 2 '' LaBr3:Ce Readout for Nuclear Physics Applications / G. Cozzi, L. Buonanno, P. Busca, M. Carminati, C. Fiorini, G.L. Montagnani, F. Acerbi, A. Gola, G. Paternoster, C. Piemonte, V. Regazzoni, N. Blasi, F. Camera, B. Million (IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD). - In: 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)[s.l] : IEEE, 2018. - ISBN 9781538622827. - pp. 1-3 (( convegno IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) / 24th International Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors tenutosi a Atlanta nel 2017 [10.1109/NSSMIC.2017.8532888].
A SiPM-Based Detection Module for 2 '' LaBr3:Ce Readout for Nuclear Physics Applications
F. Camera;
2018
Abstract
We present a SiPM-based gamma-ray detection module, which allows to read large LaBr3:Ce cylindrical crystals (diameter > 1'), typically adopted in nuclear physics experiments, with spectroscopic performances similar to those achievable with PMTs. High-Density SiPM technology for Near UltraViolet and blue light detection (NUV-HD, Fondazione Bruno Kessler, Italy) were used. These SiPMs show high Photo Detection Efficiency (PDE = 45% at 380 nm) and low Dark Count Rate (DCR < 100 kHz/mm2). The photodetector prototype has a modular structure based on an array of 5 × 6 SiPMs, each one having an active area of 6 × 6 mm2 and 30 μm microcells. This array was used for 1' scintillator readout and it was assembled in 2 × 2 planar format for the 2' scintillator readout. The spectroscopic measurements presented in this work were performed with 2' × 2' LaBr3:Ce irradiated with 57C, 133Ba, 137Cs and 60Co calibration sources. An energy resolution of 3.19 ± 0.01% was achieved at 662 keV with 2' LaBr3:Ce. The same crystal was tested with a Super Bialkali PMT (Hamamatsu R6233-100) showing a similar energy resolution of 3.07 ± 0.03% at 662 keV. Therefore, these results support the equivalence between SiPM and PMT for high-resolution spectroscopy.
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