Nuclear pulse signal digital Gaussian forming method based on analog CR-RC circuit

Abstract

The invention discloses a nuclear pulse signal digital Gaussian forming method based on an analog CR-RC circuit. The nuclear pulse signal digital Gaussian forming method based on the analog CR-RC circuit includes the steps that according to the analog CR-RC circuit, the step response of the CR-RC circuit is derived; the impulse response of a digital Gaussian forming system is derived with a step response invariance method; after digital nuclear pulse signals pass through the digital Gaussian forming system, Gaussian signals are formed by the digital nuclear pulse signals. With the method, the digital Gaussian forming demand of the nuclear pulse signals is met, the signal waveform after forming is a good Gaussian waveform, and certain capacity for separating pileup nuclear pulse signals is achieved.

Description

technical field [0001] The invention relates to digital Gaussian shaping of nuclear pulse signals in radioactivity measurement, in particular to a method for digital Gaussian shaping of nuclear pulse signals based on an analog CR-RC circuit. Background technique [0002] In the nuclear energy spectrum measurement instrument, the signal output from the detector and the amplifier is usually mixed with noise, which is superimposed on the pulse amplitude to cause a certain random fluctuation in the pulse amplitude, which affects the accuracy of amplitude extraction and is the main factor affecting the energy resolution. one. In addition, since nuclear radiation occurs randomly, multiple events may occur in a short period of time. If the previous pulse does not drop to zero, the subsequent pulse will be superimposed on the falling part of the previous pulse, so that the measured value of the pulse amplitude is greater than the actual value. It may even cause the false appearance...

AI Technical Summary

Problems solved by technology

However, in the analog forming system realized by CR-RC circuit, changing the width of the forming waveform needs to be adjusted by changing the relevant resistance value and capacitance value, which is not convenient and flexible enough.

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