Piezo-QEXAFS with fluorescence detection: fast time-resolved investigations of dilute specimens.
First X-ray absorption spectroscopy experiments with a vibrating piezo-driven double-crystal monochromator (piezo-QEXAFS) and fluorescence detection are reported. It is shown that high-quality XANES spectra can be recorded on a time scale of about 50 ms per spectrum, even for very low concentrations of < 10 mmol l-1 using fluorescence detection. The quality of the spectra, possible applications, as well as present limits of the technique will be discussed.
Lützenkirchen-Hecht
D
D
Institut für Materialwissenschaft und Institut für Experimentalphysik, Fachbereich 8, Bergische Universität-Gesamthochschule Wuppertal, Gaussstrasse 20, 42097 Wuppertal, Germany. dirklh@uni-wuppertal.de
Grundmann
S
S
Frahm
R
R
D008670:Metals / Q000032:analysis; D013050:Spectrometry, Fluorescence; D014965:X-Rays
D008670:Metals