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Dosimetric properties of lithium borate glass doped with dysprosium.

Characterization of thermoluminescence (TL) properties of lithium borate glass samples doped with different concentrations of dysprosium (Dy) was done in the current work. The samples were prepared by a melting method at 1100 °C and irradiated with β-particles. The results indicated that the glass samples doped with 0.1% of Dy display the best TL dosimetric properties among the other compositions. The 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 dose range 66.6 mGy - 33.3 Gy. The minimum detectible dose was evaluated to be 205.4 μGy and the samples revealed thermal fading in 312 h to 29 % from its original value.