The impact of γ-irradiation on Cd-B2o3 glass doped WO3: New evidences by TL and ESR spectroscopy

• Published in: Journal of non-crystalline solids Vol. 551; p. 120459
• Main Authors: El-Bayoumi, A.S., Alazab, Huda A., Ezz-ElDin, F.M.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-01-2021
• Subjects: Cd – b2o3 glass; Esr; Gamma irradiation; Thermoluminescence; Wo3; Gamma irradiation; Cd – b2o3 glass; Wo3; Esr; Thermoluminescence
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2020.120459

•We investigate the TL properties of tungsten oxide doped cadmium borate glass for the TLD used.•TL spectra showed luminescence quenching effect beyond 1.5 mol% WO3 additions.•The glasses were irradiated to 60Co gamma rays with doses ranging from 25Gyto2000Gy.•The sample with a concentration of 1.5 mol% WO3 has the best thermoluminescence characteristics.•The composition dependence of the g ≈ 1.935 ESR signal line intensity shows a decrease with increasing WO3 content.
A well resolved Thermoluminescence (TL) glow peak at ~168 °C was observed in Cd-borate glass doped WO3. The maximum TL intensity was observed for 1.5 mol% of WO3+ doped samples and thereafter decreases. The variation of gamma exposure (0.025→2 kGy) on TL glow curves of Cd-borate glass showed linear and sub-linear behavior supported by track interaction model (TIM). Here γ-irradiated sample shows the formation of shallow trap (surface trapping) beside the formation of deep trapping. The composition dependence of the g ≈ 1.94 ESR absorption line intensity shows a decrease with increasing WO3 content, which is attributed to a fall in the ratio of the number of unpaired pentavalent ions W5+ ions to the number of W6+ ions. The effect of gamma irradiation doses on TL and ESR studies show high response with dose which indicates that these glass samples may be useful for TL dosimetry.
Fig. 2. TL responses of 1.5 mol.% WO3 doped Cd-B2O3 glass irradiated over a dose range of 25–2000 Gy, inset: enlarged view of TL glow curves over a dose range of 25–150 Gy, (heating rate was 5 °C/s) [Display omitted]