Color center stabilization in KCl

Results of studying of F-absorption band damping in KCl crystals, induced by high current accelerator electron pulse using absorption spectroscopy with time resolution are presented. Mechanism efficiency grows with increase of divacancies concentration, and, as it follows from colour center accumulation model, its only aqt the first colouring stage, but at later stages, but to recombination of colour centers a constant increases of divacancies number is observed