Thermal Diffuse Scattering in Electron Diffraction I. General Theory

Abstract

A multi-beam dynamical theory of the thermal diffuse scattering of electrons by crystals in the harmonic lattice vibration is developed. The excitation of Bragg reflections of the incident beam is assumed. The intensity formulae of the first- and second-order thermal diffuse scatterings are expressed in terms of the averaged intensity matrix (M. Kogiso and Y. Kainuma: J. Phys. Soc. Japan 25 (1968) 498) and Born’s scattering matrix (M. Born: Proc. Roy. Soc. A180 (1942) 397). Several properties of the averaged intensity matrix are mentioned and its expressions in multi-beam cases are given.