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Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
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X-ray fluorescence analysis using synchrotron radiation at the photon factory.

Y Gohshi1, A Iida, T Matsushita

  • 1Department of Industrial Chemistry, University of Tokyo, Hongo, Bunkyo-ku, 113, Tokyo, Japan.

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X-ray fluorescence (XRF) experiments utilized diverse excitation modes for enhanced trace element detection. Monochromatic excitation shows promise for chemical state analysis in XRF applications.

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Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Physics

Background:

  • X-ray fluorescence (XRF) is a powerful analytical technique for elemental composition determination.
  • Synchrotron radiation sources offer unique properties for advanced XRF applications.
  • Optimizing excitation modes is crucial for improving detection limits and analytical capabilities.

Purpose of the Study:

  • To describe X-ray fluorescence experiments conducted at the Photon Factory, Japan.
  • To evaluate different excitation modes for energy-dispersive XRF.
  • To explore the potential of monochromatic excitation for chemical state analysis and grazing incidence XRF for near-surface analysis.

Main Methods:

  • Utilized an energy-dispersive X-ray fluorescence system.
  • Employed continuum and monochromatic excitation modes (crystal and wide band pass monochromators).
  • Applied grazing incidence X-ray fluorescence with total reflection supports for solution samples.

Main Results:

  • Achieved minimum detection limits below 0.1 ppm and 0.1 pg for thin samples without line interference.
  • Demonstrated the suitability of monochromatic excitation for chemical state analysis.
  • Successfully performed near-surface and trace analysis of solution samples.

Conclusions:

  • Diverse excitation modes in XRF offer flexibility and improved performance.
  • Monochromatic excitation enhances the chemical state analysis capabilities of XRF.
  • Grazing incidence XRF is well-suited for synchrotron radiation and near-surface analysis.