In the present work, series of silver doped Ge–Ga–S–AgI chalcohalide glasses have been prepared and
their optical transmission spectra are compared before and after c-ray irradiation at different doses.
The differential transmission spectra of the irradiated samples with and without Ag doping have been
compared to characterize the c-ray irradiation induced red-shift of electronic absorption and formation
of color centers. Ag doping plays an important role in increasing c-ray irradiation resistance of the
chalcohalide glasses due to its specific effect on the valence band and the network structure of glasses.