3D elemental mapping of materials and structures by laboratory scale spectroscopic X-ray tomography

X-Ray Microscopy Conference 2016

Egan, C.K.^1 ; Jacques, S.D.M.^1 ; Wilson, M.D.^2 ; Veale, M.C.^2 ; Seller, P.^2 ; Pattrick, R.A.D.^3 ; Withers, P.J.^1 ; Cernik, R.J.^1

School of Materials, University of Manchester, Manchester, United Kingdom^1

Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Campus, Didcot, United Kingdom^2

School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester, United Kingdom^3

关键词: Elemental chemistries;    Energy dispersive X ray spectroscopy;    Energy resolutions;    Energy-resolving detectors;    High spatial resolution;    High-resolution X-ray tomography;    Micro-focus x-ray tubes;    Threedimensional (3-d);   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/849/1/012013/pdf
DOI  :  10.1088/1742-6596/849/1/012013

来源: IOP

【 摘 要 】

Using a microfocus X-ray tube and pixelated energy-resolving detector it is possible to measure the X-ray absorption spectrum of a material with high spatial resolution. Given sufficient energy resolution in the detector it is possible to detect and identify absorption edges which are characteristic to individual chemical elements. Using computed tomography the three dimensional (3D) internal elemental chemistry of an object can be reconstructed. The application of spectroscopic X-ray tomography is demonstrated by mapping distribution of heavy elements inside a mineralised ore sample. We correlate and validate this data with high resolution X-ray tomography and energy-dispersive X-ray spectroscopy data.