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Fundamental Constants for Quantitative X-ray Microanalysis.

David C. Joy1

  • 1Oak Ridge National Laboratory, Oak Ridge, TN 37831.

Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada
|February 25, 2003
PubMed
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Quantitative X-ray microanalysis relies on fundamental constants. Current data for electron stopping power, X-ray ionization, fluorescence yield, and electron backscattering is poor, with significant gaps needing research.

Area of Science:

  • Materials Science
  • Physics
  • Analytical Chemistry

Background:

  • Quantitative X-ray microanalysis relies on fundamental constants governing electron-sample interactions.
  • Accurate analysis requires precise values for electron stopping power, X-ray ionization cross-sections, X-ray fluorescence yield, and electron backscattering yield.

Purpose of the Study:

  • To assess the current state of knowledge regarding fundamental constants used in quantitative X-ray microanalysis.
  • To identify deficiencies in data quality and quantity for key parameters.

Main Methods:

  • Literature review and critical evaluation of existing data.
  • Analysis of data availability and reliability for electron stopping power.
  • Assessment of data for X-ray ionization cross-sections, X-ray fluorescence yield, and electron backscattering yield.

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Main Results:

  • Data quality and quantity for all examined constants (electron stopping power, X-ray ionization cross-sections, X-ray fluorescence yield, electron backscattering yield) are found to be poor.
  • Significant gaps exist in the available data for these fundamental parameters.

Conclusions:

  • The current dataset for fundamental constants in X-ray microanalysis is inadequate for high-precision quantitative analysis.
  • Further research is critically needed to improve the accuracy and completeness of data for electron stopping power, X-ray ionization cross-sections, X-ray fluorescence yield, and electron backscattering yield.