Abstract
57Fe-enriched hematite, α-57Fe2O3, single crystals for the X-ray optical components of nuclear Bragg scattering (NBS) have been successfully grown by the PbO-V2O5 flux method. The X-ray rocking curves for selected areas obtained by the double-crystal method reveal that the minimum value of full width at half-maximum for the rhombohedral (6 6 6)r reflection is 2.3 arcs for λ=1.12 Å. Two types of imperfections, slight bending and sector zoning are observed in the crystals by precise X-ray topography and gonlometry. The maximum counting rate of NBS (14.4 eV photons) using the best crystal with (7 7 7)r reflection is as high as 20000 cps, which has been observed using the X-ray beam from the synchrotron radiation of TRISTAN, at National Laboratory for High Energy Physics (KEK), Tsukuba.
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