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Dosimetric properties of lithium borate glass doped with dysprosium
Nabil El-Faramawy1, Ahmed El-Naggar1,2, Clemens Woda3
1Department of Physics, Faculty of Science, Ain Shams University, 11566 Abbassia, Cairo, Egypt.
Abstract:
Characterization of thermoluminescence (TL) properties of lithium borate glass samples doped with different concentrations of dysprosium (Dy) was carried out. Samples were prepared using a melting method at 1100°C and irradiated with β-particles. The glass samples doped with 0.1% Dy displayed the best TL dosimetric properties compared with other compositions. Deconvoluted analyses of the glow curves displayed five overlapping TL glow peaks located between 392.0 and 510.3 K. A good linear TL dose-response for β-particles was obtained in the dose range 66.6 mGy to 33.3 Gy. The minimum detectible dose was evaluated to be 205.4 μGy and samples revealed thermal fading in 312 h to 29% of their original value.
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