{'fraction_non_alphanumeric': 0.03761061946902655, 'fraction_numerical': 0.034292035398230086, 'mean_word_length': 4.727848101265823, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Flux Growth and Characterization of α-57Fe2O3 Single Crystals for Nuclear Bragg Scattering Optical Components

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 A. 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.