FLUCTUATION-DOMINATED A-]0 KINETICS UNDER SHORT-RANGED INTERPARTICLE INTERACTIONS(B)

In the present paper we analyze the kinetics of irreversible A+B->0 re actions in situations appropriate to electrolyte solutions. We conside r diffusing species which experience short-range repulsive (attractive ) interactions between like (unlike) particles and we highlight the ro le of fluctuations in the particles' spatial distributions. We focus m ainly on one-dimensional systems and devise a many-particle descriptio n of the reaction kinetics. In terms of our analytical approach we sho w that at intermediate times the interplay between fluctuations and sh ort-ranged interactions gives rise to unusual behaviors, characterized by novel dynamical exponents of the particles' mean concentrations, F or batch reactions at longer times, when the concentrations drop off s ignificantly, the usual fluctuation-induced behavior is recovered. We also analyze systems with external, steady sources of particles and we show that in such situations the effects of the interactions become d ecisive at long times. Our analytical findings are in good agreement w ith the results of numerical simulations, which we also present. (C) 1 996 American Institute of Physics.