Abstract
A relaxational mechanism for the net radical CIDEP (NRCIDEP) generation in the process of triplet—radical (TR) quenching in liquids is proposed. The NRCIDEP is known to be generated by virtue of nonadiabatic transitions between terms of the TR pairs with different multiplicity. Nonadiabatic transitions induced by the fluctuating zero-field splitting interaction in the T molecule are treated in the short correlation time approximation. A number of simple analytical formulae for the NRCIDEP are derived for different values of the TR exchange interaction. These formulae predict nontrivial dependences of the NRCIDEP on the TR relative diffusion coefficient (i.e. on the viscosity of the liquid).
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