The basic concepts of microscopic diffusion studies were reviewed; beginning with the fundamental diffusion ideas of Fick and Einstein, and the scattering theory of Van Hove. Up until the mid-90s, this scattering function had been measured as a function of the wave-vector transfer and energy. The introduction of synchrotron sources with pulsed radiation then provided the possibility of studying the intermediate scattering function directly, by measuring the scattered intensity as a function of wave-vector transfer and time. The relatively new method of nuclear resonant scattering of synchrotron radiation in the forward direction was presented here, together with 2 examples: the diffusion of Fe in Fe3Si and FeAl.

Diffusion Studies with Synchrotron Radiation. G.Vogl, M.Hartmann: Journal of Physics - Condensed Matter, 2001, 13[34], 7763-74