| 摘要 |
<p>A detector and associated method are provided including a first scintillation material 40 having a light yield temperature dependence and an output at a first energy level, a second scintillation material 42 having a light yield temperature dependence similar to the first material and an output at a second energy level, and detection circuitry 72, 76, 78, 82, 84, 100, 102. The first and second outputs are responsive to radiation emitted from an ionizing radiation source 68. The detection circuitry includes a photo multiplier tube 72 configured to convert photon outputs from the first and second scintillating materials 40, 42 to electrical pulses, a counter circuit configured to count the electrical pulses generated in the photo multiplier tube 72 by the first and second materials, and a gain control circuit 102 configured to monitor the electrical pulses generated in the photomultiplier tube 72 by the second material 42 and adjust a gain of the detector upon detecting a drift in the output of the second material 42.</p> |
