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Title
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Radiometric diameter concept and exact intensities for spherical particles in x-ray fluorescence analysis
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Author
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Abstract
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| In X-ray fluorescence analysis the concept of radiometric diameter, d, is often introduced in considerations of the fluorescent intensity from a particulate sample. It represents the mean geometric path of the X-rays through one particle and is usually simply taken to be equal to the volume-to-area ratio of the particle. The effective radiometric path is, however, itself dependent on geometry and absorption effects. Rigorous calculations of the fluorescent intensity from a particle in the π and π/2 geometries were carried out to evaluate the errors involved. It appears that, for π geometry, the discrepancy between these exact results and the intensity calculated via the use of d does not exceed 5.2%. For the π/2 geometry, the errors are much larger and can amount to 50% in realistic cases of X-ray fluorescence analysis. These conclusions are also applicable to monolayers. The effective radiometric diameter approaches d only when absorption effects become negligible, but is smaller in other cases. |
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Language
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English
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Source (journal)
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X-ray spectrometry. - London
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Publication
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London
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1980
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ISSN
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0049-8246
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DOI
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10.1002/XRS.1300090205
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Volume/pages
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9
:2
(1980)
, p. 52-56
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ISI
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A1980JN16500003
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Full text (Publisher's DOI)
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