We present a high-dynamic-range, high-resolution, gamma-ray spectrometer based on a 3" co-doped lanthanum bromide (LaBr 3 (Ce+Sr)) crystal (73 ph/keV conversion efficiency, 25 ns decay time) coupled to 144 Silicon Photomultipliers (SiPMs) from Fondazione Bruno Kessler. The system reaches 2.6% energy resolution at 662 keV ( 137 Cs emission peak) and 100 keV - 30 MeV energy dynamic range thanks to a custom ASIC with automatic gain adaptation. Experimental measurements shown highlight the benefits of the gain-switching approach compared to a fixed gain, the performance at high count-rate, and the effectiveness of the custom temperature compensation platform for the SiPMs.
High-DR High-Resolution Gamma-Ray Spectroscopy with 3" LaBr3 and SiPMs
Di Vita, Davide;Buonanno, Luca;Canclini, Fabio;Ticchi, Giacomo;Carminati, Marco;Fiorini, Carlo
2021-01-01
Abstract
We present a high-dynamic-range, high-resolution, gamma-ray spectrometer based on a 3" co-doped lanthanum bromide (LaBr 3 (Ce+Sr)) crystal (73 ph/keV conversion efficiency, 25 ns decay time) coupled to 144 Silicon Photomultipliers (SiPMs) from Fondazione Bruno Kessler. The system reaches 2.6% energy resolution at 662 keV ( 137 Cs emission peak) and 100 keV - 30 MeV energy dynamic range thanks to a custom ASIC with automatic gain adaptation. Experimental measurements shown highlight the benefits of the gain-switching approach compared to a fixed gain, the performance at high count-rate, and the effectiveness of the custom temperature compensation platform for the SiPMs.| File | Dimensione | Formato | |
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High-DR High-Resolution Gamma-Ray Spectroscopy with 3'' LaBr3 and SiPMs - NSS 2021.pdf
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