Infrared and UV–visible spectroscopic measurements are accepted to be very sensitive methods which are frequently used for the characterization of local order of structural building units in glasses together with the coordination and valency states of transition metal ions. These combined spectral analysis have been applied to investigate the valence or coordinate states of 3d transition metal ions in alkali borate [14,15], lead borate [16], lead silicate [17], lead phosphate [18] and bismuth borate glasses [19]. Also, such investigations include the measurements of the effect of gamma irradiation on the spectral properties with the view to determine the suitability of the TMs-doped glasses as radiationsensitive
dosimeters or as shielding candidates. These extensive spectral studies indicate that some of the transition metal ions reveal shielding behavior towards successive gamma irradiation.