Radiation-Induced Defect Formation in Silica Glasses

The dose dependence of the induced absorption and TL peaks and the results of the thermal treatment of the samples affected by the 60Co γ‐ray, n—γ reactor radiation, and proton fluences are analyzed. The generation of displaced oxygen atoms and their vacancies is proved to be possible under γ‐radiation, causing the destruction of aluminum—alkaline centres, the decrease of the absorption band at 550 nm and of the TL peak intensity, noticeable at doses above 5 × 106 Gy. In reactor‐irradiated samples the absorption band at 550 nm is induced by the γ‐radiation of the reactor. The transformation of the aluminum—alkaline centres having an absorption band at 550 nm into aluminum—hydrogen centres under the proton irradiation is found. [Russian Text Ignored.]