The evaluation of self-absorption effects in energy-dispersive x-ray fluorescence analysis due to the light element matrix has been referred to in the literature as the 'dark matrix' problem. Its solution is necessarily required in order to obtain non-destructive quantitative analysis of glasses, ceramics, etc. Since in the proper energy range of the exciting x-radiation the mass Compton scattering coefficient can be considered constant for light elements, in this paper we show that by measuring Compton scattering at a fixed angle from the same sample under examination we can deduce the matrix attenuation coefficients to correct the experimental x-ray line intensities. In this way the corresponding linear equation set for relative contents of elements in the sample can be solved. This method represents a more direct alternative to the numerical iterative procedures to which one resorts in most cases. The experimental results obtained in the quantitative analysis of some mediaeval stained glasses, for which, as for old ceramics, non-destructive analyses are mandatory, are also reported.
Direct evaluation of self-absorption effects in dark matrices by Compton scattering measurements / L. Bonizzoni, A. Galli, M. Milazzo. - In: X-RAY SPECTROMETRY. - ISSN 0049-8246. - 29:6(2000), pp. 443-448.
|Titolo:||Direct evaluation of self-absorption effects in dark matrices by Compton scattering measurements|
MILAZZO, MARIO MARCELLO (Corresponding)
|Settore Scientifico Disciplinare:||Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)|
|Data di pubblicazione:||2000|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1002/1097-4539(200011/12)29:6<443::AID-XRS451>3.0.CO;2-B|
|Appare nelle tipologie:||01 - Articolo su periodico|
File in questo prodotto:
|1097-4539(200011_12)29_6_443__AID-XRS451_3.0.CO;2-B.pdf||Publisher's version/PDF||Administrator Richiedi una copia|