The ESR spectrum of oxygen vacancies in sodium tellurite glasses

Abstract

A theoretical analysis is presented for the shape of the ESR spectrum of the radiation-induced centers of oxygen vacancy type in sodium tellurite glasses. It is found that a qualitative agreement between the theoretical and observed curves can be obtained only if one assumes a completely anisotropic g factor and an inhomogeneous structure for the paramagnetic centers, whose parameters are found as gx = 1.930; gy = 1.971; gz = 2.046; <δg x 2 >=4−10−4-2.5·10−3; <δg y 2 > = 4.9·10−8-1·10−6; <δg z 2 > = 2.2·10−4-9·10−4; <δH d 2 > = 36–100 G2. It is concluded that the glass composition affects the center nonuniformity.