Virtual standard for wavelength-dispersive electron-probe microanalysis

Autor: Wouter Van Renterghem, Claude Merlet, Renato Restani, Xavier Llovet, O. Dugne, Stephan Bremier
Přispěvatelé: Géosciences Montpellier, Université des Antilles et de la Guyane (UAG)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Universitat de Barcelona (UB), JRC Institute for Transuranium Elements [Karlsruhe] (ITU ), European Commission - Joint Research Centre [Karlsruhe] (JRC), Centre d'Etude de l'Energie Nucléaire (SCK-CEN)
Rok vydání: 2007
Předmět:
Zdroj: Microchimica Acta
Microchimica Acta, Springer Verlag, 2008, 161 (3-4), pp.427-432. ⟨10.1007/s00604-007-0856-2⟩
ISSN: 1436-5073
0026-3672
DOI: 10.1007/s00604-007-0856-2
Popis: International audience; A calibration method aimed at converting X-ray intensities into absolute units has been tested in different electron microprobes. The calibration requires measurement of the X-ray peak profile and measurement and calculation of the bremsstrahlung intensity emitted from a reference sample, at the energy of the X-ray line of interest. Specifically, measurements of the U M alpha and M beta lines emitted from UO2 and bremsstrahlung intensities emitted from an Al reference sample have been performed on five different instruments. The aim of the work is to determine to what accuracy X-ray intensities emitted from reference samples of actinide elements are transferable among different electron microprobes (virtual standard). The influence of the focussing geometry and different crystals and proportional counters used is analysed. Strategies to reduce the uncertainties affecting the absolute calibration of the studied lines are discussed.
Databáze: OpenAIRE
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