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Calculation of photo‐ and auger electron contribution to X‐ray fluorescence excitation of elements with low atomic number
Author(s) -
Pavlinsky G. V.,
Dukhanin A. Yu.
Publication year - 1994
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.1300230507
Subject(s) - photoionization , auger , atomic physics , auger effect , excitation , electron , auger electron spectroscopy , atomic number , fluorescence , wavelength , chemistry , materials science , analytical chemistry (journal) , ion , optics , ionization , physics , optoelectronics , organic chemistry , quantum mechanics , chromatography , nuclear physics
The contribution of photo‐ and Auger electrons generated in analyte material to the x‐ray fluorescence of elements with atomic numbers from Z = 5 (boron) to 9 (fluorine) was evaluated. The calculations were performed for different x‐ray tube anodes, window thicknesses and working regimes. This contribution to x‐ray fluorescence excitation increases rapidly with decreasing atomic number of the measured element and depends greatly on the sample composition and experimental conditions. In some cases the contribution may exceed 90%. This high value results from the absorption in the window and in the x‐ray anode tube material of the long‐wavelength component of primary radiation which is most effective in photoionization of element atoms. It follows from the calculations that at shorter wavelengths, e.g. for Na and Cu, the contribution of photo‐ and Auger electrons to the excitation of their fluorescence seems to be much less significant than that obtained in other work.