Effects of 7.5 MeV electron beam irradiation on optical properties of Eu 3+ -doped zinc sodium bismuth borate glasses
2019
The present study aims to examine the effects of beaming 7.5 MeV electron on europium-doped zinc sodium
bismuth borate glasses (prepared through melt quench technique) and the resulting changes in structural and
optical properties. The study also examines the structural depolymerization of irradiated glasses, analyzed using
recorded Fourier transform infrared spectra. Absorbance spectra along with Tauc’s plot were used to find the
optical band gap of pristine and irradiated glasses. The study observes changes in photoluminescence spectra of
irradiated Eu3+-doped glasses, monitored by exciting the samples at 394 nm. The study notes a decrease in
emission intensity of Eu3+ ions observed from the emission spectra of electron beam treated glass samples. The
thermally stimulated luminescence (TL) measurements of irradiated glasses resulted in intense glow peaks with
increasing electron beam doses [4–50 kGy]. The TL glow curve exhibited two dissimilar peaks at distinct temperatures
of 490 K and 610 K respectively. The obtained trap-depth (0.93 eV) using Chen’s relation and intensity
variation of first glow peak at 490 K as a function electron beam doses facilitates ZNBBE-4 glass for dosimetry
applications.
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