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Energy Dispersive X-Ray Fluorescence Spectrometry at High Count Rates: Pulsed Tube Excitation and Recovery of Resolution by Computer Processing

Published online by Cambridge University Press:  06 March 2019

J . E. Stewart ,
H. R. Zulliger  and
W. E. Drummond
J . E. Stewart
Affiliation:
Nuclear Semiconductor Mountain View, California 94043
H. R. Zulliger
Affiliation:
Nuclear Semiconductor Mountain View, California 94043
W. E. Drummond
Affiliation:
Nuclear Semiconductor Mountain View, California 94043
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Abstract

Energy dispersive X-ray spectrometry has the potential for making very rapid analyses of multi-element samples. In order to fully exploit this capability several studies have been carried out with the goal of improving performance at high input count rates. A refined amplifier permits operation at input count rates up to 80000 per second with minimal peak shift and distortion. Optimum choice of tube parameters and filters permits utilization of a single Mo transmission target tube to analyze a broad range of elements in minimum time. Use of a pulsed tube further reduces the time required for analysis without sacrifice of precision or resolution. Dead time necessarily increases with increasing input count rate. It can be reduced by selecting a short amplifier time constant, but only with a loss of resolution. Digital processing permits recovery of the lost resolution. Some illustrations are given of spectra that have been processed on-line using a computer based multi-channel analyzer.

Type
Mathematical Correction Procedures for X-Ray Spectrochemical Analysis
Information
Advances in X-Ray Analysis , Volume 19: Twenty-Fourth Annual Conference on Applications of X-ray Analysis, August 6-8, 1975 , 1975 , pp. 153 - 160
Copyright
Copyright © International Centre for Diffraction Data 1975

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References

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