A new approach to structure amplitude determination from 3-beam convergent beam electron diffraction patterns
作者： Philip N.H. Nakashima , Alexander F. Moodie , Joanne Etheridge
DOI: 10.1016/J.ULTRAMIC.2011.01.044
关键词: Phase problem 、 Accuracy and precision 、 Chemistry 、 Distribution (mathematics) 、 Optics 、 Electron diffraction 、 Beam (structure) 、 Position (vector) 、 Intensity (physics) 、 Amplitude
摘要: The intensity distribution in three-beam CBED patterns from centrosymmetric crystals can be inverted analytically to enable the direct measurement of crystal structure amplitudes and three-phase invariants. accuracy measurements depends upon precision with which specific loci within discs identified. present work exploits equivalence form along these provide an algorithm for their automated location, enabling rapid unequivocal identification position. Moreover, it demonstrates how used determine directly relative magnitudes superior without recourse complex pattern-matching calculations.
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