Radiation resistance property of barium gallo-germanate glass doped by Nb₂O₅

Effects of Nb₂O₅ dopant on the radiation response of barium gallo-germanate (BGG) glass are studied mainly by electron paramagnetic resonance and absorption spectroscopy. Owing to the Nb⁵⁺↔Nb³⁺ interconversion in doped samples, formations of Ge-related non-bridging oxygen hole center and Ge-related electron center defects after γ-ray irradiation are inhibited. Thereby, Nb₂O₅ dopant can enhance radiation resistance of BGG glass, and 1.0% Nb₂O₅ concentration is the best.