Oh And Interstitial-h_2 Concentration Dependence Of Intensities Of X-ray-induced Absorption Of Type-iii Fused Silica

摘要

Hydroxyl and interstitial-H_2 concentration dependence of X-ray-induced absorption of type-III fused silica up to an irradiation time of 6 h was studied. Induced absorption spectra in the fused silica irradiated with X-rays from a Rh target with a dosage of 2×10~4 C kg~(-1) h~(-1) were reproduced by six Gaussian absorption bands at 3.8, 4.8, 5.0, 5.4, 5.8 and 6.5 eV. Intensities of these absorption bands increased with the power of the irradiation time. OH and interstitial-H_2 concentration dependence at 1 h and 6 h are similar in the doubly logarithmic plot. A linear relationship between the intensities of each absorption component and the H_2 concentration was observed, while no clear dependence of these intensities on the OH concentration was observed. Intensities of absorption bands decreased linearly as the H_2 concentration increased except for 5.0-eV band in which the intensity increased as the H_2 concentration increased.