Formation of color centers at X-ray irradiation of ZnSe single crystals

Abstract

In the present work we study the dose dependences of X-ray luminescence and X-ray conductivity at different temperatures and different angles of incidence of the exciting radiation and the registration of luminescence. Low-energy X-ray quanta (with energies up to 20 keV) do not create new structural defects in ZnSe crystals, but can only recharge existing ones. It was established from the dose dependences of the luminescence intensity of the 630-nm and 970-nm bands that X-rays do not create the color centers in ZnSe crystals, even those that are temperature unstable, which absorb the luminescent radiation. This fact is confirmed by the absence of conduction current change at additional optical intensive irradiation of ZnSe samples by optical quanta with wavelengths that coincide with luminescent quanta.