光谱学与光谱分析, 2018, 38 (11): 3593, 网络出版: 2018-11-25  

精细X荧光光谱中伪峰剔除方法的研究

Study of the False Peak Eliminating Algorithm in Fine EDXRF
作者单位
成都理工大学核技术学院, 四川 成都 610059
摘要
在高计数率背景下, 采用数字慢三角成形处理算法的高性能硅漂移探测器X荧光光谱全能峰受到伪峰严重干扰。 介绍了一种新型的剔除伪峰干扰的方法, 详细阐述了该方法中数字三角形成形、 信号甄别和伪峰判断等技术要点。 以55Fe核素和岩石样品为实验对象, 对比伪峰剔除前和剔除后得到的X荧光能谱, 结果证明该方法能够较好地消除谱线图中的伪峰。 因而, 在精细X荧光能谱分析时, 该方法能够提高能谱的峰背比和痕量元素的分析精确度。
Abstract
In the background of high counting rate, the full-energy peak of X-rays fluorescence is seriously disturbed by the false peak whichis caused by the charge sensitive preamplifier in High Performance Silicon Drift Detector and slow digital shaping algorithm. In this paper, a novel method of false peak eliminating is presented. And some technical points are also introduced in details such asdigital triangleshaping, signal screening and peak discrimination. Taking 55Fe nuclide and rock samples as experimentations, the spectrum before and after the false peak eliminating are compared. And the results showed that the false peak can availably be eliminated. Therefore, the performance of fine X-rays fluorescence will be improved such as peak to background ratio and accuracy of trace elements analysing.

周伟, 刘泽威, 周航, 梁菲惜, 张蓉舟. 精细X荧光光谱中伪峰剔除方法的研究[J]. 光谱学与光谱分析, 2018, 38(11): 3593. ZHOU Wei, LIU Ze-wei, ZHOU Hang, LIANG Fei-xi, ZHANG Rong-zhou. Study of the False Peak Eliminating Algorithm in Fine EDXRF[J]. Spectroscopy and Spectral Analysis, 2018, 38(11): 3593.

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