Different concentrations of bismuth oxide (x= 0, 5, 10, 15, 20, 25, 30) are added at the expense of boron oxide in the synthesized glassy matrix containing a fixed concentration of lead oxide.All the prepared samples are characterized using FTIR, UV/Vis.spectroscopic techniques and XRD before and after being exposed to -radiation of doses 8 and 12 Mrad.No changes are observed in the wavenumber po...