Synthesis, Structure, and Superconductivity in Be1.09B3

Optical absorption of some selected high-lead borate glasses containing chromium exposed to different doses of gamma-irradiation was studied. The results obtained showed that the absorption bands before and after irradiation exhibited changes with the radiation dose and chemical composition of the glass. The response of the glass to gamma irradiation was related to the creation and spread of defects "color centers," the approach of a saturation condition after a certain irradiation dose, and the possible photochemical effect on the transition metal present in the glass.