Short-living centers of color and luminescence in LiNbO{sub 3} crystals irradiated by pulsed electron beams; Korotkozhivushchie tsentry okraski i lyuminestsentsiya v obluchennykh impul'snymi ehlektronnymi puchkami kristallakh LiNbO{sub 3}

Paper presents data on investigation into spectra of short-living optical absorption (SOA) and of luminescence inducted in lithium niobate crystals under pulsed electron irradiation (0.25 MeV, 20 ns, 15-160 mJ/Cm{sup 2}) within 80-350 K temperature range. Within SOA spectra one distinguished anisotropic band with maximums at 1.6 and 4.0 eV resulting from capture of one or two conduction electrons for bunches (Nb{sub Nb} - Nb{sub Li}) respectively as well as, slightly polarized bands at 2.5 and 3.3 eV caused by holes localized in Li and Nb vacancies. Cathodoluminescence (CL) of lithium niobate crystals is characterized by quick ({tau} < 4 ns) dying down. Variation of initial defect nature of crystal via their regeneration under 830 K is shown to result in similar for CL and for SOA variation of spectra.