Onsager length

This occurs because the initial separation length between the cation radical and the electron is smaller than the Onsager length (/ (.) at which the thermal energy of an electron corresponds to the Coulomb field. This reaction is called the geminate ion recombination and has been investigated by many researchers globally. 

Figure 13 (a) Comparison of the simulation curve with the analytical solution given by Hong and Noolandi [11,13,83]. The initial distribution function and the Onsager length (r ) were taken as a delta function S(r—ro) of = 7.5 nm and = 30 nm, respectively. The dots and the solid line indicate the analytical solution and the simulation curve, respectively, (b) Time-dependent distribution function that was obtained from the simulation of (a), r indicates the distance between the cation radical and the electron. 

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