The effect of annealing at 250°C for fifty hours on the optical properties of quartz irradiated with an integral flux of fast neutrons of 4*10^18 n/cm^2 is investigated. It is shown that prolonged heating does not lead to complete annealing of the radiation defects including color centers. The existence of incomplete jannealing is indicated by the anomalous temperature behavior of the intensity of the 128 cm^(-1) and 466 cm^(-1)lines in the Raman spectrum of the irradiated specimen, I and also by the fact that the maximum at 2.78 μ is still present in the infrared spectrum after annealing.
Department of General Physics for Physicists
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