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Mixed Element Microparticle Characterization by Electron Probe Microanalysis.

Alexis T Riche1, Peter McSwiggen2, Kayleigh Harvey3

  • 1Savannah River National Laboratory, Aiken, SC 29808, USA.

Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada
|March 29, 2025
PubMed
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This summary is machine-generated.

Electron probe microanalysis offers a nondestructive method for characterizing microparticles in nuclear forensics. This technique accurately quantifies trace elements, complementing destructive methods.

Area of Science:

  • Nuclear Forensics
  • Materials Science
  • Analytical Chemistry

Background:

  • Traditional nuclear forensics relies on destructive techniques like secondary ion mass spectrometry.
  • These methods consume samples, preventing further analysis.
  • Electron probe microanalysis (EPMA) is a rapid, nondestructive technique used in material science.

Purpose of the Study:

  • To evaluate EPMA as an alternative tool for microparticle analysis in nuclear forensics.
  • To develop a method for quantitative compositional characterization of microparticles using EPMA.
  • To assess EPMA's applicability for analyzing mixed-element systems relevant to nuclear forensics.

Main Methods:

  • Utilized electron probe microanalysis (EPMA) for imaging and quantitative analysis.
Keywords:
EPMAimpurity analysismicroanalysismicroparticlesnuclear forensicstrace elements

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  • Employed a calibration curve derived from quadrupole-inductively coupled plasma-mass spectrometry (ICP-MS) for quantification.
  • Analyzed nickel-doped cerium oxide microparticles as analogs for actinide-doped materials.

    • Main Results:

    • Successfully detected and quantified nickel dopant in cerium oxide microparticles down to trace levels (parts per million).
    • Demonstrated the capability of EPMA for high-fidelity, quantitative single-particle characterization.
    • Validated the use of EPMA with ICP-MS calibration for analyzing mixed-element systems.

    Conclusions:

    • EPMA is a viable, nondestructive alternative for microparticle analysis in nuclear forensics.
    • The technique can accurately quantify trace elements in mixed-element systems.
    • EPMA provides a valuable complement to existing destructive analytical methods.