title: Spatially resolved 3D micro-XANES by a confocal detection scheme.
abstract: A confocal setup based on polycapillary half-lenses was used to demonstrate three-dimensional (3D) spatially resolved mu-XANES in fluorescence detection mode at the DUBBLE XAS station of the ESRF (BM26A). The incoming beam was focused using a polycapillary half-lens and a second glass polycapillary was placed in front of the energy dispersive detector to establish the confocal detection. The full-width-half-maxima along the main axes of the resulting ellipsoidal detection volume were 18.5 x 12.0 x 10.0 microm(3) at the Cu K-edge. The confocal mu-XANES mode is applied in the 3D resolved study of mineral inclusions in rare natural diamonds at the Fe K edge.
authors.affiliation: X-Ray Microspectroscopy and Imaging Research Group (XMI), Department of Analytical Chemistry, Ghent University, Krijgslaan 281 S12, B-9000 Gent, Belgium. Geert.Silversmit@UGent.be
authors.forename: Geert
authors.initials: G
authors.lastname: Silversmit
authors.forename: Bart
authors.initials: B
authors.lastname: Vekemans
authors.forename: Sergey
authors.initials: S
authors.lastname: Nikitenko
authors.forename: Sylvia
authors.initials: S
authors.lastname: Schmitz
authors.forename: Tom
authors.initials: T
authors.lastname: Schoonjans
authors.forename: Frank E
authors.initials: FE
authors.lastname: Brenker
authors.forename: Laszlo
authors.initials: L
authors.lastname: Vincze