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

Abstract

No abstracts

Induced acceleration of the decay of the 31-yr isomer of 178m2 Hf using bremsstrahlung radiation

“…The production [28] and absorption of bremsstrahlung photons in the dense Ta matrix was calculated directly by simple integration or when it is not possible -numerically. We assume that the 178m2 Hf isomers are homogeneously distributed over the target thickness.…”

The prediction of thick target electron bremsstrahlung spectra in the 0.25–50 keV energy range

“…Several authors tried to find analytical expressions for the continuum background so that only one parameter remained undetermined [73][74][75][76][77]. This scaling factor depends on the particular detection geometry and must be fitted for each equipment -but not for each spectrum because it is not related neither to the sample composition nor to the excitation conditions.…”

“…Nevertheless, in a previous work [75] it was pointed out that the predictions given by Eq. (5) were not accurate enough for a wide range of experimental conditions, particularly for high atomic numbers.…”

“…It must be emphasized that all comparisons were performed by improving the correction models (absorption and backscattering) included in the factor G of Eq. (5), which indeed produces better results than those of their original work [75].…”

“…A large set of spectra was involved in the fitting process in order to achieve a reliable Table 1 Global χ 2 values for the comparison performed by Trincavelli et al [75]. Reed's model [52] with coefficients given by Statham [65] and the expression given by Small et al [74] were also assessed expression for the continuum function which describes properly the bremsstrahlung spectrum for photon energies ranging from 0.25 to 20 keV and atomic numbers between 4 and 83, at beam energies ranging from 5 to 38 keV.…”