Abstract
CuO doped lead borate glasses of the composition PbO 70%–B2O3 30% with varying CuO contents were prepared. UV–visible and infrared spectroscopic studies were measured before and after successive gamma irradiation with two different doses namely 2 and 8Mrad. The experimental results indicate that the undoped sample reveals strong UV–near visible absorption while copper doped samples show additional broad visible band due to (Cu2+) ions.
FT infrared absorption spectrum reveals vibrational bands due to triangular and tetrahedral borate groups together with the sharing of Pb–O vibrations.
CuO-doped glasses have been found to show a shielding behavior towards the effects of progressive gamma irradiation causing the maintenance of the spectral curves. The changes in the UV–visible and infrared spectral data are discussed in relation to the states of copper ions and structural evolution caused by the change in glass composition including the CuO.
► Glasses of composition PbO 70%–B2O3 30% doped with CuO were prepared. ► Infrared and UV–visible absorption spectra were measured before and after gamma irradiation. ► Visible absorption bands are attributed to the existence of cupric ions (Cu2+). ► Experimental data indicate the presence of both triangular and tetrahedral borate groups. ► Shielding behavior of lead borate glasses were observed upon irradiation.