A modelling method is developed that permits qualitative investigation of the evolution of genetic pairs of Frenkel defects in alkali-halide crystals (AHC). The relaxation kinetics and the form of the low-temperature annealing curves of F-, H-pairs are determined by initial mutual distribution functions (IDF) of the pairs being formed up to the time of excess energy dissipation by an H-center. It is shown that, because of discreteness of the lattice for AHC, interactions between the F- and H-centers are characteristic of IDF with a nonuniform spacing distribution of the F- and H-pairs. Fundamental regularities of Frenkel defect relaxation after pulse exposure and of F-, H-pair annealing after low-temperature AHC exposure are discussed on the basis of modelling results.
ASJC Scopus subject areas
- Physics and Astronomy(all)