Naslov
A Modified Approach to Quantitative XRF Analysis of Thick Targets

Autori
Orlić, Ivica ; Tomić, Sanja ; Makjanić, Jagoda ; Jakšić, Milko ; Valković, Vladivoj

Izvornik
X-ray spectrometry (0049-8246) 16 (1987), 3; 125-130

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
XRF; thick targets

Sažetak
The widely used formalism for quantitative XRF analysis based on the correction of characteristic line intensity for absorption effects is shown to be inadequate when thick samples with low total mass attenuation coefficients are analysed (biological samples, solutions, etc.). The geometry factor is not a constant function of the collimator's shape and dimensions, but it is found that in an analysed matrix it depends on the line energy and penetration depth. An experimental and a theoretical model for the determination of the geometrical correction are proposed and tested on a set of samples. The concentrations obtained are in excellent agreement with the values expected, whereas the model based on the correction of intensities only for absorption effects gives an error of at least 25% for thick samples.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA