We study the ternary A + 2B --> C reaction-diffusion process with initially separated reactants. A perturbation approach gives a scaling of the global reaction rate with t(1/2) at early time, followed by a crossover to t(-1/2) in the asymptotic time regime, a behavior which is the same as for the binary A + B-->C reaction under initial segregation. Monte Carlo simulations are in good agreement with the predicted scaling. [References: 14]
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