Thermoluminescence Characteristics of Boron and Er³⁺ doped SiO₂
Suhaila Abu Bakar, and Yusoff Mohd. Amin, and Misni Misran, (2004) Thermoluminescence Characteristics of Boron and Er³⁺ doped SiO₂. Jurnal Fizik Malaysia, 25 (3 & 4). pp. 69-72. ISSN 0128-0333
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University of Malaya. Faculty of Science. Dept. of Physics
University of Malaya. Facuty of Science. Dept. of Chemistry
The thermoluminescence (TL) emission properties of conventional silica (SiO₂) prepared by the sol gel technique are studied. The undoped monolithic silica glasses exhibit a TL peak at a temperature of 225°C (), which can be used for ionising radiation dosimetry. The silica is doped with boron and erbium in order to increase TL response sensitivity and to widen the range of dose response. The boron doped SiO₂ is found to be more sensitive to radiation, and has shown almost no fading of TL signal compared with Er³⁺ doped SiO₂. The boron and Er³⁺ doped SiO₂ exhibited TL peaks at 370°C and 250°C, respectively, indicating the former had deep trapping levels. The boron doped SiO₂ showed a linear dose response over a range of ~1-250 Gy.
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