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Model for the bremsstrahlung spectrum in EPMA. Application to standardless quantification
Author(s) -
Trincavelli Jorge,
Castellano Gustavo,
Riveros J. Alberto
Publication year - 1998
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/(sici)1097-4539(199803/04)27:2<81::aid-xrs253>3.0.co;2-r
Subject(s) - bremsstrahlung , spectral line , electron microprobe , homogeneous , analytical chemistry (journal) , computational physics , electron , chemistry , materials science , physics , nuclear physics , statistical physics , mineralogy , chromatography , astronomy
The Kramers expression was modified after fitting 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 spectra—much closer than other models assessed. The proposed function was applied to a standardless quantification method based on peak‐to‐background ratios. © 1998 John Wiley & Sons, Ltd.