On the relation between oxygen diffusion and secondary relaxation in glassy n-butanol

The temperature dependence of target problem in a medium with energy disorder has been evaluated by computer simulation in the framework of the random barrier model. A box distribution of barrier heights was used. The temperature was varied from T*/40 to T*/20, where T* is the width of distribution in temperature units. It is shown that the kinetics of target decay is spatially heterogeneous. The number of available pathways remains almost the same with temperature variations.