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Confocal Micro X-Ray Fluorescence: A New Paradigm in Materials Characterization

Published online by Cambridge University Press:  14 March 2018

Brian M. Patterson ,
George J. Havrilla  and
Kimberly A. DeFriend
Brian M. Patterson*
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM
George J. Havrilla
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM
Kimberly A. DeFriend
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM
*
bpatterson@lanl.gov

Extract

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Micro x-ray fluorescence (MXRF) is a microscopic analysis and imaging technique that is used to characterize the elements in a material non-destructively. Micro XRF instruments use an x-ray source to shine x-rays on a sample, and a detector to detect the characteristic x-rays given off. These fluorescent x-rays have very specific energies corresponding to specific electron energy transitions. Therefore, it is possible to detect and identify all of the elements present in a sample (typically above sodium) as well as measure their concentrations. This technique is widely used for the characterization of materials including polymer and metallic foams, powder samples, forensics applications, geological samples, works of art and nuclear fuels. Commercial MXRF instruments use a fused silica optic (mono or polycapillary) to focus the x-rays on the sample with no optic on the detector (Figure 1a).

Type
Research Article
Information
Microscopy Today , Volume 16 , Issue 4 , July 2008 , pp. 38 - 41
Copyright
Copyright © Microscopy Society of America 2008

References

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