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The effects of absorption edge structure of atoms in x‐ray fluorescence analysis
Author(s) -
Borkhodoev V. Ya.
Publication year - 2009
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.1136
Subject(s) - xanes , attenuation , attenuation coefficient , absorption (acoustics) , extended x ray absorption fine structure , absorption edge , mass attenuation coefficient , x ray , range (aeronautics) , line (geometry) , analytical chemistry (journal) , radiation , enhanced data rates for gsm evolution , x ray fluorescence , fluorescence , atomic physics , materials science , chemistry , spectral line , absorption spectroscopy , optics , physics , band gap , optoelectronics , telecommunications , geometry , mathematics , chromatography , astronomy , computer science , composite material
Abstract The effects of the absorption edge structure in x‐ray fluorescence (XRF) manifest themselves as a very strong attenuation of the analytical line radiation when it is in the x‐ray absorption near edge structure (XANES) range. In this paper, this effect is exemplified by an ultra‐strong Ba‐caused attenuation of the Ce Lβ 1 line. This case was experimentally studied. Comparison of measured and calculated relative intensities has shown that the actual mass attenuation coefficient of the Ce Lβ 1 line in Ba is 1.6 times greater than known values. This is due to that the Ce Lβ 1 line is within the initial range of L3 Ba absorption edge, i. e. the XANES range. Such an effect of the absorption edge structure of atoms must be considered using the fundamental parameters method in quantitative XRF analysis. This paper also presents some other possible cases of this effect. Copyright © 2009 John Wiley & Sons, Ltd.