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 g_x = 1.930; g_y = 1.971; g_z = 2.046; <δg ²_x >=4−10⁻⁴-2.5·10⁻³; <δg ²_y > = 4.9·10⁻⁸-1·10⁻⁶; <δg ²_z > = 2.2·10⁻⁴-9·10⁻⁴; <δH ²_d > = 36–100 G². It is concluded that the glass composition affects the center nonuniformity.