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We have characterized two state-of-the-art solid-state photomultipliers, oneby SensL, the other by Hamamatsu, coupled to scintillators by Saint-GobainCrystals in the -25 to 50 degrees C temperature range. At room temperature, theenergy resolution at 661.6 keV measured with both detectors is worse than theresolution obtained when the crystals are coupled to a regular photomultipliertube. Both the pulse height and pulse height resolution of the 661.6 keV gammarays in the 137Cs spectrum vary strongly with temperature. The noise thresholddetermined from the 22Na spectrum increases quadratically as the temperature isincreased to well above 100 keV at +50 degrees C for both detectors.

Temperature characterization of scintillation detectors using solid-state photomultipliers for radiation monitoring applications