[en] Using the method of light decoloration of colour centers induced in Verneuli corundum crystals by 50-MeV electrons, there was found a decrease in intensity of additional absorption over the whole spectrum range (2-6.2 eV) under photoexcitation of irradiated crystals with 2.64 eV quanta. Separate absorption bands attributed to Cr²⁺ and Cr⁴⁺ centers are distinduished in the spectrum. Recharge of F- and F⁺-centers of HDC crystals irradiated with 50-MeV electrons at 300 deg and 77 deg K is investigated in detail. It is found that photoexcitation with 6.05-eV photons leads to decrease in absorption intensity of F-centers and increases in that of F⁺-centers. Whereas in case of 4.8 eV photoexcitation an opposite picture can be observed. The obtained results are in good agreement with the experimental data