Multiple elastic scattering of core-loss electrons in atomic resolution imaging
- Monash Centre for Electron Microscopy, Monash University, Victoria 3800 (Australia) and Department of Materials Engineering, Monash University, Victoria 3800 (Australia)
We consider the elastic scattering of a fast incident electron both prior and subsequent to its involvement in an atomic inner-shell ionization (core-loss) event in a crystal. By using numerical simulations, it is shown that elastic scattering subsequent to ionization can strongly affect the qualitative features of atomic resolution core-loss images of crystals recorded in the scanning transmission electron microscope (STEM). This conclusion holds even for a thin crystal foil and for a relatively large detector, which is matched to the probe-forming aperture in an aberration-corrected STEM. Such a conclusion is potentially very important for the interpretation of experimental core-loss images. We also introduce an approximate model that incorporates the effects of elastic scattering subsequent to ionization in the case of a small detector.
- OSTI ID:
- 21143539
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 77, Issue 18; Other Information: DOI: 10.1103/PhysRevB.77.184107; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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