Characteristics of precession electron diffraction intensities from dynamical simulations

Wharton Sinkler*, Laurence D. Marks

*Corresponding author for this work

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Precession Electron Diffraction (PED) offers a number of advantages for crystal structure analysis and solving unknown structures using electron diffraction. The current article uses many-beam simulations of PED intensities, in combination with model structures, to arrive at a better understanding of how PED differs from standard unprecessed electron diffraction. It is shown that precession reduces the chaotic oscillatory behavior of electron diffraction intensities as a function of thickness. An additional characteristic of PED which is revealed by simulations is reduced sensitivity to structure factor phases. This is shown to be a general feature of dynamical intensities collected under conditions in which patterns with multiple incident beam orientations are averaged together. A new and significantly faster method is demonstrated for dynamical calculations of PED intensities, based on using information contained in off-central columns of the scattering matrix.

Original languageEnglish (US)
Pages (from-to)47-55
Number of pages9
JournalZeitschrift fur Kristallographie
Volume225
Issue number2-3
DOIs
StatePublished - Mar 1 2010

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Inorganic Chemistry

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