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Figure 4
The solid curve corresponds to the calculated dynamical fraction of intensity in a Bragg spot as a function of sample thickness, taking inelastic scattering into account and assuming a 200 keV electron. The dashed curve assumes there is no inelastic scattering (or that the data have been measured using an energy filter and inelastically scattered electrons have been removed). The horizontal axis must be rescaled as explained in the legend to Fig. 2[link] for other electron energies. The asymptote of the solid curve is about 0.25, indicating that irrespective of the sample thickness, the kinematical fraction of a Bragg spot corresponds to at least 75% of the total intensity. The dashed curve eventually reaches unit, indicating that for very thick samples, the intensity in the Bragg spots becomes exclusively dynamical.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 75| Part 4| August 2019| Pages 523-531
https://doi.org/10.1107/S2052520619009661
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