Title: Theory of Electron Scattering and Electron Diffraction
Abstract: This chapter presents the theory of electron scattering and electron diffraction and also explains the geometry of diffraction by perfect crystals. A perfect crystal is a periodic array of atoms. The scattered waves from one atom interfere with scattered waves from other atoms in the crystal. This interference redistributes the scattered amplitude and yielding directions in which the scattered intensity is a maximum, because of constructive interference, or a minimum, because of destructive interference. Usually, the directions of diffracted maxima are given by geometrical considerations only. Hence, the basic geometry of the diffraction by crystals of any incident wave is essentially the same. For a finite crystal, there would be only partially destructive interference and hence there would be a finite nonzero diffracted intensity in directions other than exact Bragg reflection directions. For finite crystals, as used in practice, it is therefore necessary to give a more careful treatment of the geometry of diffraction.
Publication Year: 2002
Publication Date: 2002-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
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