REVERSIBLE DIFFUSION-CONTROLLED REACTIONS IN A COLLOIDAL KINETIC ISING-MODEL

The time-dependence of reversible diffusion-controlled reactions in a binary suspension of equal-sized spheres is studied on the basis of th e time-correlation matrix of concentration fluctuations in thermal equ ilibrium. The transient effects are calculated in an Enskog-type appro ximation from the nonequilibrium distribution function of a pair of di ffusing and mutating spheres. The equilibrium radial distribution func tions of the system are assumed to be sufficiently well known. The cal culation yields predictions of the time-correlation matrix of concentr ation fluctuations, which can be compared with computer simulations of the model system.