The kinetics of defect aggregation and metal colloid formation in ionic solids under irradiation

摘要: Abstract Results of a microscopic theory describing diffusion-controlled aggregation radiation Frenkel defects — F and H centers are discussed. We suggest interpretation experimental data on metal colloid formation in the two ionic solids with different crystalline structures LiF CaF2 observed under electron irradiation subsequent heating. Theory successfully reproduces main observations including Ostwald ripening small colloids into large narrow temperature interval suggests that radiation-enhanced center diffusion occurs as low activation energy 0.4 eV. In contrast, for single is found to be high 1.5 The key role mutual defect elastic attraction their demonstrated.