Direct and Reciprocal X-Ray Fluorescence Holography - a Comparison
Abstract
Direct and reciprocal X-ray fluorescence holography are novel methods for structure determination based on atomic resolution holography. Because of experimental difficulties, most X-ray fluorescence holography experiments were so far performed in a mixed mode. This makes it necessary to separate during the data evaluation the direct and reciprocal signals that are measured together. Here we report first results obtained from pure experiments in both methods. They were carried out at beamlines BW1 and CEMO at HASYLAB on a bcc Fe single crystal that served because of its simple atomic arrangement as a test structure. Experimental differences of the methods and their consequences for the holograms are discussed. The holograms show Kossel or X-ray standing wave lines. Reconstructing the holograms with a Fourier-like transform yields atom positions in three dimensions. The spatial resolution obtained depends on the angular and energy range available in the holograms.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2000
- Bibcode:
- 2000APS..MARY32001H