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Digital Spectrum Processing of the Characteristic K-Lines of the Lanthanides

Published online by Cambridge University Press:  06 March 2019

V. I. Smolniakov  and
I. A. Koltoun
V. I. Smolniakov
Affiliation:
Neutron Research Department, Petersburg Nuclear Physics Institute (PNPI), Russian Academy of Sciences Gatchina, Leningrad region, St, Petersburg, 188350, Russia
I. A. Koltoun
Affiliation:
Neutron Research Department, Petersburg Nuclear Physics Institute (PNPI), Russian Academy of Sciences Gatchina, Leningrad region, St, Petersburg, 188350, Russia
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Abstract

For the decomposition of complex multiplets, which consist of the fluorescent K-series of the lanthanides in the energy range from 30 keV to 60 keV, the procedure of digital filtering of the spectrum data was elaborated using the libraries of real-shape lines. This elaboration was applied to the software for energy-dispersive x-ray fluorescent spectrometers based on Si(Li) and HP Ge planar detectors.

Taking into account the fact that the real shape of line is changed under different count rate, the procedure of spectrum processing has the following principle peculiarities:

  1. - three levels of library of real-shape lines, i.e. the level of high content of fluorescent elements, middle and low contents;

  2. - the regulation of parameters of digital filters;

  3. - use of the nonlinear least squares technique;

Also the estimation of quality of this investigation is given.

Type
IX. XRS Mathematical Methods, Trace Analysis and Other Applications
Information
Advances in X-Ray Analysis , Volume 38: Forty-third Annual Conference on Applications of X-ray Analysis , 1994 , pp. 657 - 663
Copyright
Copyright © International Centre for Diffraction Data 1994

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References

1. Smolniakov, V. I. and Koltoun, I. A., Decomposition Spectrometric Data of Energy Dispersive X-Ray Fluorescence Analysis (EDXRF) in “Advances in X-Ray Analysis”, Vol. 35B : 743, Plenum Press, New York and London.Google Scholar
2. McCarthy, J. J. and Schamber, F. H., 1979, Least-Squares Fit with Digital Filter: Status Report , in “Energy Dispersive X-Ray Spectrometry”, Proc. of a Workshop on Energy Dispersive X-Ray Spectrometry held at the NBS, Gaithersburg (1979), Heinrich, K.F.J., Newbury, D.E., Myklebust, R.L., NBS, Washington (1981).Google Scholar
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