Journal
APPLIED RADIATION AND ISOTOPES
Volume 78, Issue -, Pages 21-25Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.apradiso.2013.03.095
Keywords
Thermoluminescence; Dosimetry; Lithium potassium borate; Copper; Titanium; Magnesium dopants
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Funding
- Ministry of Higher Education (MOHE) of Malaysia
- International Doctoral Fellowship-UTM through the Research University Grant Scheme (RUGS) [QJ130000.2526.03H27]
- Strategic Technologies Program, National Plan for Science, Technology and Innovation (NPSTI) in the Kingdom of Saudi Arabia [11-MED1977-02]
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New glasses Li2CO3-K2CO3-H3BO3 (LKB) co-doped with CuO and MgO, or with TiO2 and MgO, were synthesized by the chemical quenching technique. The thermoluminescence (TL) responses of LKB:Cu, Mg and LKB:Ti,Mg irradiated with 6 MV photons or 6 MeV electrons were compared in the dose range 0.5-4.0 Gy. The standard commercial dosimeter LiF:Mg,Ti (TLD-100) was used to calibrate the TL reader and as a reference in comparison of the U properties of the new materials. The dependence of the responses of the new materials on Co-60 dose is linear in the range of 1-1000 Gy. The TL yields of both of the co-doped glasses and TLD-100 are greater for electron irradiation than for photon irradiation. The TL sensitivity of LKB:Ti,Mg is 1.3 times higher than the sensitivity of LKB:Cu,Mg and 12 times less than the sensitivity of TLD-100. The new TL dosimetric materials have low effective atomic numbers, good linearity of the dose responses, excellent signal reproducibility, and a simple glow curve structure. This combination of properties makes them suitable for radiation dosimetry. (c) 2013 Elsevier Ltd. All rights reserved.
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