title: Methodology toward 3D micro X-ray fluorescence imaging using an energy dispersive charge-coupled device detector.
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.
authors.affiliation: X-ray Microspectroscopy and Imaging Research Group (XMI), Department of Analytical Chemistry, Ghent University , B-9000 Ghent, Belgium.
authors.forename: Jan
authors.initials: J
authors.lastname: Garrevoet
authors.forename: Bart
authors.initials: B
authors.lastname: Vekemans
authors.forename: Pieter
authors.initials: P
authors.lastname: Tack
authors.forename: Björn
authors.initials: B
authors.lastname: De Samber
authors.forename: Sylvia
authors.initials: S
authors.lastname: Schmitz
authors.forename: Frank E
authors.initials: FE
authors.lastname: Brenker
authors.forename: Gerald
authors.initials: G
authors.lastname: Falkenberg
authors.forename: Laszlo
authors.initials: L
authors.lastname: Vincze