Electronic absorption spectra and EPR spectra of irradiated silicate glasses

Abstract

The election absorption spectra of sodium silicate glasses in the visible region and the EPR spectra of γ-irradiated two-component alkali silicate glasses have been studied. It has been established that the electron absorption spectra of these glasses have two bands in the visible region of the spectrum, while the EPR line with g=2.01 consists of two components. A comparison of the absorption spectral data with the EPR spectra showed that the band having a maximum around 4400 å and the Β-component of the doublet with g=2.01 are associated with the same hole center, of the type Si-O^−⊕... Me⁺ while the band having a maximum around 6200 å and the α-component of the doublet arise from a hole center of the type Si-O^−⊕. The change in the ratio of the intensities of the α- and Β-components with changes in the concentration and type of alkali metal is explained.