Abstract
A new x-ray diffraction method is described for measuring radii of curvature of crystals using a one-dimensional solid-state detector together with an extremely parallel incident x-ray beam. The present method is based on the measurement of the slope of loci of rocking curve maximum in a contour map of x-ray rocking curves versus position on the sample. The detection limit for the radius of curvature is estimated to be a few thousand meters using this method. The local variation of the curvature over a sample is easily revealed and precisely determined from the contour map of x-ray rocking curves. Several examples of curvature determination by the present method are presented and compared with the results of the commonly used double-crystal diffractometer method.
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