No abstract

A study is made of EPR, optical absorption (in the range 2 to 6 eV) and density variation of LiF crystals that have been irradiated in a reactor with doses up to 1019 neutrons/cm2. In the irradiated crystals the main paramagnetic defects are F‐centres. Some conclusions are drawn as to irradiation‐induced expansion processes and the formation of colour centres. Some details of the aggregation process of F‐centres are clarified by thermal annealing of the irradiated crystals.

No abstract

In this paper are analysed the processes of electronic centre aggregation to colloidal alkali metal particles in alkali halide crystals under radiation. It is shown that the existing theories of particle coalescence do not describe the experimentally observed kinetics of radiolysis. A new model of radiation colloid formation in these systems is proposed in which the interaction between colloidal centres is taken into account. In the present model the experimentally observed dose and temperature dependences, as well as the size distribution of the electron products of radiolysis, are explained.

No abstract