Abstract

The jump rate of light interstitials between neighboring sites with energy difference is examined on the basis of Kondo's theory which takes account of the non-adiabatic response of conduction electrons to the motion of interstitials. The average of the jump rate is calculated by adopting simple models for the energy distribution and the occupation probability of sites. It is found that the average jump rate at low temperatures becomes constant when the occupation probability of sites is independent of their energies, whereas it decreases with decreasing temperature when thermal equilibrium can be attained.

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