A simple intuitive theory for electron diffraction

摘要: Abstract It is shown that the dynamical diffraction can simply be described in real space using property electrons are trapped electrostatic potential of atomic columns. Due to this channelling effect, electron highly inside each column, and at same time retain a one-to-one relationship with crystal structure. This description does not require periodic. Influence adjacent columns treated perturbation theory. If sufficiently thin, i.e. order 10 nm, accelerating voltage too high (e.g. 100–300 keV), motion almost perfectly periodic depth. The theory shows how depth periodicity related mass/thickness column which allows exit wavefunction parametrized simple analytical form. These results open perspectives solve inverse problem derive projected structure object from wavefunction.