Methodology toward 3D micro X-ray fluorescence imaging using an energy dispersive charge-coupled device detector

Jan Garrevoet; Bart Vekemans; Pieter Tack; Björn De Samber; Sylvia Schmitz; Frank E Brenker; Gerald Falkenberg; Laszlo Vincze

doi:10.1021/ac503410s

Methodology toward 3D micro X-ray fluorescence imaging using an energy dispersive charge-coupled device detector

Anal Chem. 2014 Dec 2;86(23):11826-32. doi: 10.1021/ac503410s. Epub 2014 Nov 13.

Authors

Jan Garrevoet¹, Bart Vekemans, Pieter Tack, Björn De Samber, Sylvia Schmitz, Frank E Brenker, Gerald Falkenberg, Laszlo Vincze

Affiliation

¹ X-ray Microspectroscopy and Imaging Research Group (XMI), Department of Analytical Chemistry, Ghent University , B-9000 Ghent, Belgium.

PMID: 25346101
DOI: 10.1021/ac503410s

Abstract

A new three-dimensional (3D) micro X-ray fluorescence (μXRF) methodology based on a novel 2D energy dispersive CCD detector has been developed and evaluated at the P06 beamline of the Petra-III storage ring (DESY) in Hamburg, Germany. This method is based on the illumination of the investigated sample cross-section by a horizontally focused beam (vertical sheet beam) while fluorescent X-rays are detected perpendicularly to the sheet beam by a 2D energy dispersive (ED) CCD detector allowing the collection of 2D cross-sectional elemental images of a certain depth within the sample, limited only by signal self-absorption effects. 3D elemental information is obtained by a linear scan of the sample in the horizontal direction across the vertically oriented sheet beam and combining the detected cross-sectional images into a 3D elemental distribution data set. Results of the 3D μXRF analysis of mineral inclusions in natural deep Earth diamonds are presented to illustrate this new methodology.