The strong UV-near visible absorption bands are observed to suppress any further UV bands from TM ions. The studied glasses show obvious resistant to gamma irradiation and only small changes are
observed upon gamma irradiation. This observed shielding behavior is related to the presence of high
Bi3+ ions with heavy mass causing the observed stability of the optical absorption. Infrared absorption
spectra of the studied glasses reveal characteristic vibrational bands due to both modes from silicate network and the sharing of Bi–O linkages and the presence of TMs in the doping level (0.2%) causes no distinct changes within the number or position of the vibrational modes. The presence of high Bi2O3 content (70 mol%) appears to cause stability of the structural building units towards gamma irradiation as
revealed by FTIR measurements.