Expanding sphere model of the radiation chemistry of liquids

A model of the radiation chemistry of liquids is derived from which the concentration of radicals as a function of time can be calculated. The model is based on the prescribed diffusion hypothesis of Jaffe-Lea-Samuel-Magee. It uses initial conditions similar to those of Mozumder and Magee. 25 It yields, inter alia, a simple one-parameter expression for molecular yields as a function of scavenger concentration. This is compared and gives good agreement with experimental results on molecular yields in aqueous solutions over a wide range of scavenger concentrations for a variety of scavengers.