Properties of the reaction front in a reversibleA+B⇌gkCreaction-diffusion process

We study the properties of the reaction front formed in a reversible reaction-diffusion process, A+B${\mathrm{?}}_{\mathit{g}}^{\mathit{k}}$C, with initially separated reagents. It is shown that the dynamics of the front can be described in terms of a crossover between ‘‘irreversible’’ scaling at short times (t≪${\mathit{g}}^{\mathrm{-}1}$) and ‘‘reversible’’ scaling at long times (t≫${\mathit{g}}^{\mathrm{-}1}$). The reversible regime is dominated by diffusion and the critical exponents characterizing the properties of the front are independent of dimension.