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

摘要

We have characterized two state-of-the-art solid-state photomultipliers, one by SensL, the other by Hamamatsu, coupled to scintillators by Saint-Gobain Crystals in the -25 to +50 ℃ temperature range. At room temperature, the energy resolution at 661.6 keV measured with both detectors is worse than the resolution obtained when the crystals are coupled to a regular photomultiplier tube. Both the pulse height and pulse height resolution of the 661.6 keV gamma rays in the ~(137)Cs spectrum vary strongly with temperature. The noise threshold determined from the ~(22)Na spectrum increases quadratically as the temperature is increased to well above 100keV at +50℃ for both detectors.