Two-step tunnelling of the electron to scavengers

Abstract

We have formulated the kinetics of tunnelling of the trapped electron to a solute S₁via a second solute S₂, taking into account the spatial distributions of the solutes. The yield of first solute anions was calculated as a function of time and the concentrations of first and second solutes. An interacting finding is that at fixed time and first solute concentration, this yield is almost independent of the second solute concentration. Recent experimental results by Kira et al. on selective electron capture are interpreted by the two-step tunnelling model.