Calibration method for confocal x-ray microanalysis with polychromatic excitation

PÉREZ R. D.; SOSA, C.; SÁNCHEZ H.J.; SBARATO, V.; LEANI J.; PÉREZ C.A.

Campinas

Otro; Turno de medición; 2012

ABTLus

As in any other analytical technique, the first step for the application of the confocal XRF is the calibration of the spectrometer. The goal is the measurement of the spectrometer sensitivity, it means, the determination of a spatial and energy function which relates the elemental concentration with the detected XRF. Theoretical description of the confocal sensitivity using fundamental parameters was presented in the literature. When it is applied for polychromatic excitation the influence of the excitation lens in the XRF intensity is more pronounced, since their focalization properties for all energies present in the incident beam must be considered to evaluate the XRF intensity. Therefore, a detailed characterization of the excitation lens is required for the calibration of the confocal setup.