Development and application of laboratory X-ray fluorescence holography equipment

Abstract

The X-ray fluorescence holography ͑XFH͒ method has drawn the attention of many researchers as a novel experimental technique for imaging a three-dimensional local atomic structure around a certain element in a single crystal. Synchrotron radiation ͑SR͒ has been mainly used for the measurements because of extremely weak signals that are about 0.3% of isotropic fluorescent radiation. The measurements limited to the use of a SR source clearly hinder from increasing the number of the users. Thus, we developed a laboratory XFH equipment with a conventional X-ray source by using a singly bent graphite monochromator with a large curvature and X-ray detector for a high counting rate. With this equipment, we have successfully demonstrated that high-quality hologram data of a gold single crystal almost equivalent to those with a SR source are obtained. Four different holograms are recorded in the normal and inverse XFH modes. An atomic image reconstructed from these holograms patterns shows a distinct atomic image of Au. © 2004 International Centre for Diffraction Data.

Element sensitive holographic imaging of atomic structures using white x rays

“…In the case of monochromatic XFH, only a few attempts have been made using conventional x-ray sources. 1,[6][7][8][9] For a review of XFH and recent application examples, see Refs. 10 and 11. A way around to solve the twin-image problem is to use a white beam for recording x-ray fluorescence holograms.…”

Applications of X-Ray Holography

“…Many approaches are used to measure the threedimensional structure of element atoms and their surroundings in materials. X-ray fluorescence holography (XFH) is one of the approaches [34][35][36][37]. e use of shortpulse X-ray sources in combination with high-resolution detectors in X-ray holography can provide clear atomic images.…”