Extinction Contour in Electron Microscopic Images of Crystals

抄録

The intensity distribution of elastic scattering agrees satisfactorily with the dynamical theory of electron diffraction if amorphous surface layers such as oxide and contamination are quite thin. The extinction contour formed by inelastic scattering of plasmon excitation is studied in detail. The difference of absorption coefficients obtained from elastic scattering and electron microscopic images is estimated by including the deviation of the Bragg condition for inelastic scattering.