Pulse Pile-up Correction Method for Digital Gaussian Synthesis Shaping Based on Pulse Separation
In order to solve the situation that the pulse pile-up processing method based on the time comparison method cannot deal with the stacking of multiple pulse peaks,a pile-up correction method based on pulse separation is proposed.In the digital Gaussian shaping processing system of nuclear pulse signals,fast and slow dual-channel shaping is used to construct the two-dimensional and three-dimensional linear equation systems respectively,and to derive the amplitude correction functions in different pulse pile-up cases.The results show that the stacking correc-tion method based on pulse separation can effectively realize the pile-up identification and pulse amplitude correc-tion in the case of peak pile-up and retain more nuclear pulse signals.The simulation test results on the LaBr3 de-tector show that the method improves the energy spectrum resolution from 12.31％to 3.73％and the peak counts from 1 104 to 3 424 when the input count rate reaches 6.125 x 105/s,which can be further applied to the pulse pile-up identification and amplitude correction in the digital nuclear energy spectroscopy measurement system.
digital nuclear energy spectrumpulse separationenergy resolutionpile-up correction
万方数据
维普
