Abstract
The composition of the glass is Bi2O3 (20%)–Na2O (15%)–B2O3 (50%)–SiO2 (15%) was prepared by conventional melt quench method. To study the effect of heavy ion irradiation on the glass network and structural units, thin films of the glass have been prepared by electron beam gun evaporation. The prepared films are irradiated using 120MeV Ag7+ ions in the fluence range of 1×1012–3×1013ionscm−2. The optical and structural properties were investigated using UV–visible absorption spectroscopy and Fourier Transform Infrared (FTIR) spectroscopic techniques. A significant decrease in the band gap is observed after irradiation which is indicative of the fact that radiation has caused compaction in the glass structure.
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