Abstract
AbstractDiffusional relaxation of mobile defects in crystals containing local disturbances is considered. It is shown that the distribution density of the inverse relaxation times in such a system calculated as the imaginary part of the trace of the diffusion equation Green's function may involve resonance maxima. Their positions are determined by the interaction potential of the mobile defect and the immobile local perturbation center. The relevant internal friction peaks when detected provide a possibility of investigating this potential. The distribution density of the inverse relaxation times is calculated for a number of particular systems which model the diffusional relaxation of point defects in the local fields of a point disturbance and of a plane defect and the kink relaxation in the presence of a disturbance. It is shown that several internal friction peaks can be associated with a single relaxation mechanism.
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