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Development and application of laboratory X-ray fluorescence holography equipment

Published online by Cambridge University Press:  06 March 2012

Y. Takahashi*
Affiliation:
Department of Materials Science, Graduate School of Engineering, Tohoku University, Aoba-yama 02, Sendai 980-8579, Japan
K. Hayashi
Affiliation:
Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan
E. Matsubara
Affiliation:
Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan
*
a)Author to whom correspondence should be addressed; Electronic mail: [email protected]

Abstract

The X-ray fluorescence holography (XFH) 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 (SR) 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

Type
Technical Articles
Copyright
Copyright © Cambridge University Press 2004

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