LaBr3 scintillation detector and specific event elimination method

摘要

Events such as α decay included in the light emission of the LaBr3 scintillator are identified, and only γ-ray events are collected. A LaBr3 scintillator 10, a photomultiplier tube 12, an oscilloscope 14 and a computer 18 are provided. The computer 18 detects the peak value Vp and the total charge amount Qtotal of the voltage waveform signal, and calculates an error propagation equation function of the ratio between the peak value Vp and the total charge amount Qtotal. This error propagation equation function is used as a threshold function to identify and eliminate α decay events. The α decay event is identified from the measurement values that can be actually measured in real time, such as the peak value Vp and the total charge amount Qtotal.