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The density and tube energy dependency of cobalt K α /K β in x‐ray fluorescence spectrometryfor thick target measurements
Author(s) -
Karimi Minoo,
Amiri Nayereh,
Ahadnejad Vahid
Publication year - 2008
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.1086
Subject(s) - analytical chemistry (journal) , cobalt , wavelength , energy (signal processing) , tube furnace , fluorescence , materials science , voltage , atomic physics , chemistry , optics , physics , organic chemistry , chromatography , quantum mechanics , metallurgy
The relative intensity of K α /K β for cobalt in thick targets with cobalt mass densities from 0.51 to 22.49% has been measured by the wavelength dispersive x‐ray fluorescence (XRF) spectrometer. The measuring conditions are: tube current ranging from 10 to 60 mA and voltages ranging from 20 to 60 kV. We plotted the K α /K β ratio vs Co densities for different tube voltages and currents. Our study shows that the K α /K β ratio is below the theoretical value for low Co densities and it increases with increasing Co density. For higher x‐ray energies, the K α /K β ratio shows a sharp growth at the special density and then reaches a nearly constant value. However, K α /K β ratio is theoretically constant and independent of energy in thin target measurements. The changes of this ratio according to the x‐ray energy and the element density have been studied in thick target measurements. The results provide experimental evidence to suggest that exciting energy and element density can indeed affect the K α /K β ratio. Copyright © 2008 John Wiley & Sons, Ltd.