Calibration method for confocal X-ray microanalysis with polychromatic excitation

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To apply the fundamental parameters method at the confocal setup the knowledge of the sensitivity of the spectrometer is required which depends on the characteristics of two X-ray lenses: one in the excitation channel and another in the detection channel. For the particular case of polychromatic exc...

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Autores principales:	Sosa, Carlos Manuel, Stoytschew, Valentin, Leani, Juan José, Sánchez, Héctor Jorge, Pérez, Carlos Alberto, Pérez, Roberto Daniel
Formato:	article
Lenguaje:	Inglés
Publicado:	2022
Materias:	Confocal X-ray microfluorescence Synchrotron radiation
Acceso en línea:	http://hdl.handle.net/11086/23937 https://doi.org/10.1155/2015/368054
Aporte de:	Repositorio Digital Universitario (UNC) de Universidad Nacional de Córdoba

id	I10-R141-11086-23937
record_format	dspace
institution	Universidad Nacional de Córdoba
institution_str	I-10
repository_str	R-141
collection	Repositorio Digital Universitario (UNC)
language	Inglés
topic	Confocal X-ray microfluorescence Synchrotron radiation
spellingShingle	Confocal X-ray microfluorescence Synchrotron radiation Sosa, Carlos Manuel Stoytschew, Valentin Leani, Juan José Sánchez, Héctor Jorge Pérez, Carlos Alberto Pérez, Roberto Daniel Calibration method for confocal X-ray microanalysis with polychromatic excitation
topic_facet	Confocal X-ray microfluorescence Synchrotron radiation
description	To apply the fundamental parameters method at the confocal setup the knowledge of the sensitivity of the spectrometer is required which depends on the characteristics of two X-ray lenses: one in the excitation channel and another in the detection channel. For the particular case of polychromatic excitation, the theory shows that the focalization properties of the excitation lens for all incident energies affect the X-ray fluorescence intensity. Therefore the traditional calibration method based on the measurement of standard samples becomes unstable since the number of required fitting parameters is too high. To reduce these parameters a previous characterization of the excitation lens by a simulation program was employed giving rise to a simplified confocal setup calibration. The developed calibration method was applied for a confocal spectrometer implemented in the Brazilian Synchrotron Radiation Source (LNLS) with white beam.The experimental parameters of the sensitivity were obtained from depth profile analysis of several pure thin films. The calibrated confocal setup was used to quantify reference standards in order to validate the calibration procedure. Our results for elemental concentrations show relative errors less than 15% for the quantitative analysis of a light matrix reference standard.
format	article
author	Sosa, Carlos Manuel Stoytschew, Valentin Leani, Juan José Sánchez, Héctor Jorge Pérez, Carlos Alberto Pérez, Roberto Daniel
author_facet	Sosa, Carlos Manuel Stoytschew, Valentin Leani, Juan José Sánchez, Héctor Jorge Pérez, Carlos Alberto Pérez, Roberto Daniel
author_sort	Sosa, Carlos Manuel
title	Calibration method for confocal X-ray microanalysis with polychromatic excitation
title_short	Calibration method for confocal X-ray microanalysis with polychromatic excitation
title_full	Calibration method for confocal X-ray microanalysis with polychromatic excitation
title_fullStr	Calibration method for confocal X-ray microanalysis with polychromatic excitation
title_full_unstemmed	Calibration method for confocal X-ray microanalysis with polychromatic excitation
title_sort	calibration method for confocal x-ray microanalysis with polychromatic excitation
publishDate	2022
url	http://hdl.handle.net/11086/23937 https://doi.org/10.1155/2015/368054
work_keys_str_mv	AT sosacarlosmanuel calibrationmethodforconfocalxraymicroanalysiswithpolychromaticexcitation AT stoytschewvalentin calibrationmethodforconfocalxraymicroanalysiswithpolychromaticexcitation AT leanijuanjose calibrationmethodforconfocalxraymicroanalysiswithpolychromaticexcitation AT sanchezhectorjorge calibrationmethodforconfocalxraymicroanalysiswithpolychromaticexcitation AT perezcarlosalberto calibrationmethodforconfocalxraymicroanalysiswithpolychromaticexcitation AT perezrobertodaniel calibrationmethodforconfocalxraymicroanalysiswithpolychromaticexcitation
bdutipo_str	Repositorios
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Calibration method for confocal X-ray microanalysis with polychromatic excitation

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