Journal
APPLIED RADIATION AND ISOTOPES
Volume 91, Issue -, Pages 126-130Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.apradiso.2014.05.023
Keywords
Thermoluminescence; Lithium potassium borate glass; Titanium oxide; Glow curve deconvolution
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Funding
- Universiti Teknologi Malaysia through Research University Grant Scheme (RUGS) [Q.J130000.2526.07H59]
- Postdoctoral Research University Fellowship (PDRU) [Q.J130000.21A2.01E52]
- Ministry of Education Malaysia through Fundamental Research Grant scheme (FRGS) [R.J130000.7826.4F168]
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Lithium potassium borate (LKB) glasses co-doped with TiO2 and MgO were prepared using the melt quenching technique. The glasses were cut into transparent chips and exposed to gamma rays of Co-60 to study their thermoluminescence (TL) properties. The TL glow curve of the Ti-doped material featured a single prominent peak at 230 degrees C. Additional incorporation of MgO as a co-activator enhanced the TL intensity threefold. LKB:Ti,Mg is a low-Z material (Z(eff)=8.89) with slow signal fading. Its radiation sensitivity is 12 times lower that the sensitivity of TLD-100. The dose response is linear at doses up to 103 Gy. The trap parameters, such as the kinetics order, activation energy, and frequency factor, which are related to the glow peak, were determined using TolAnal software. (C) 2014 Elsevier Ltd. All rights reserved.
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