物探与化探Issue(2)：318-321,4.DOI:10.11720/wtyht.2015.2.17
基于双参数模型核脉冲信号数字高斯成形技术
A study of nuclear pulse signal digital Gaussian shaping based on dual-factor mode
摘要
Abstract
The study of a novel model for digital nuclear pulse signal Gaussian shaping based on amplitude factor and width factor is de⁃scribed in this paper. According to Sallen⁃Key filter( S⁃K filter in short) , four formulae are established between the input and the output depending on Kirchhoff Current Law. With dual⁃factor parameter substitution, a general numerical recursive root is obtained by applying numerical differentiation algorithm. The correctness of the model is verified by computer simulation through the standard exponential de⁃cay signal and actual nuclear signal. The shaping factors are also confirmed. Finally, the digital Gaussian shaping technique is applied to the Energy Dispersive X⁃Ray Fluorescence system and, as a result, the spectrum of 55 Fe is obtained. Testing results show that digital shaping technique can improve the performance of the EDXRF system in such aspects as energy resolution and count ratio.关键词
核信号/S-K滤波器/数字高斯成形/双参数模型/数值微分算法Key words
nuclear signal/S-K filter/digital Gaussian shaping/dual-factor model/numerical differentiation algorithm分类
天文与地球科学引用本文复制引用
周伟,周建斌..基于双参数模型核脉冲信号数字高斯成形技术[J].物探与化探,2015,(2):318-321,4.基金项目
国家高技术研究发展计划（863）项目课题（2012AA06180403）；放射性地质与勘探技术国防重点学科实验室开放基金 （）
