A.A.Zharikov, N.V.Shokhirev
The Influence of Solvent Polarity and Viscosity on Magnetic Effects in
Geminate Recombination - Balance Approximation.
Zeitschrift für Physikalische Chemie - International Journal
of Research In Physical Chemistry & Chemical Physics.
177:37-61, Part 1, 1992.
Abstract:
The influence of a magnetic field on the geminate recombination of
ion-radicals in solutions is studied within the framework of a balance
approximation. In the model, the motion in a pair is described by the
isotropic diffusion in the Coulomb potential. It is assumed that the
transitions between the spin states occur outside the strong exchange
zone and are described in terms of rate constants. The effect of the
medium polarity and viscosity on the magnitude of the magnetic field
effect is studied. It is shown that S-T+(T-) transitions at the point of
intersection of energy terms make a considerable contribution to the
magnetic effect and may cause a change of the sign of the magnetic field
effect at high viscosities. The influence of these transitions on the
magnetic field effect in media of different viscosity is investigated
theoretically and numerically.