Luminescence kinetics in proton-irradiated quartz glasses

It is experimentally demonstrated that the intensity of the radiation-induc ed luminescence (RIL) of KU-1 and KI quartz glasses at 450 nm increases mor e than ten times upon the proton irradiation (proton energy, 8 MeV; dose ra te, 5 x 10(3) Gy/s; dose, up to 1.2 x 10(7) Gy) to a dose of 10(6) Gy. At a dose exceeding 10(6) Gy, the spectral efficiency of the ionizing radiation energy conversion reached similar to 10(-6) nm(-1) in the maximum of the R IL band at 450 nm for all types of glasses. After preliminary low-rate gamm a-irradiation (below 0.5 Gy/s), the RIL intensity in the beginning of the p roton irradiation and its variation with the proton dose depend on the conc entration of impurities in the quartz glass. The RIL intensity buildup depe nds on the formation of positively and negatively charged microscopic regio ns in glasses. (C) 2000 MAIK "Nauka/Interperiodica".