Model for the bremsstrahlung spectrum in EPMA. Application to standardless quantification

J. TRINCAVELLI; G. CASTELLANO; J. A. RIVEROS

X-RAY SPECTROMETRY

Wiley

Lugar: Amberes, Bélgica; Año: 1998 vol. 27 p. 81 - 86

0049-8246

The Kramers expression was modiÐed after Ðtting 52 spectra from targets of diverse composition at several incident energies. The function obtained describes adequately the continuum x-ray spectrum observed when a bulk, homogeneous and polished sample is irradiated by an electron beam with energies ranging from 5 to 35 keV. The targets considered are pure and multicomponent, covering elements from boron to bismuth. In addition to simplicity, the new expression shows very good agreement with measured spectraÈmuch closer than other models assessed. The proposed function was applied to a standardless quantiÐcation method based on peak-to-background ratios.