Excitations and atomic transport in classical binary isotopic fluids

Abstract

As the simplest binary system in which excitations as well as atomic transport can be studied, the theory of isotopic mixtures is developed in two directions: (i) Simple, though approximate, models are set up, to obtain a picture of the partial dynamical structure factors over a substantial region of the (q, omega ) plane. (ii) A careful study is made of the diffusion limit in the case of small mass differences.