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Influence of dopants on the glow curve structure and energy dependence of LiF:Mg, Cu, Si detectors

Knežević, Željka; Ranogajec-Komor, Maria; Miljanić, Saveta; Lee, Jungil; Kim, Jang-Lyul; Musić, Svetozar (2011) Influence of dopants on the glow curve structure and energy dependence of LiF:Mg, Cu, Si detectors. Radiation Measurements, 46 (3). pp. 329-333. ISSN 1350-4487

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Abstract

LiF thermoluminescent material doped with Mg, Cu and Si recently developed by the Korea Atomic Energy Research Institute (KAERI) has shown very good dosimetric properties. Since the thermoluminescence in LiF was found to be dependent on the proper combination of dopants, the investigation of the concentration and type of dopants is very important in developing and characterisation of new TL materials. The aim of this work was to determine the influence of type and concentration of activators on the glow curve structure, sensitivity, reproducibility and on the photon energy response of LiF:Mg, Cu, Si detectors. The energy response was studied in air and on the ISO water phantom in the range of mean photon energies between 33 keV and 164 keV. The morphology and local chemical composition of LiF:Mg, Cu, Si detectors were examined using high resolution scanning electron microscopy (FE-SEM). The results show that type and concentration of activators influence the glow curve and sensitivity. Different dopant concentrations did not show influence on the photon energy response. The sensitivity of LiF:Mg, Cu, Si detector with dopant concentration of Mg=0.35 mol%, Cu=0.025 mol% and Si=0.9 mol% was very high (up to 65 times higher than that of TLD-100). The photon energy response of LiF:Mg, Cu, Si detectors containing all three dopants in various concentrations is in accordance with the IAEA recommendations for individual monitoring.

Item Type: Article
Uncontrolled Keywords: LiF:Mg, Cu, Si detectors; dopants; energy dependece; glowcurve
Subjects: NATURAL SCIENCES > Physics
NATURAL SCIENCES > Chemistry
NATURAL SCIENCES > Interdisciplinary Natural Sciences > Radiation Science
Divisions: Division of Materials Chemistry
Projects:
Project titleProject leaderProject codeProject type
Fizičko-kemijski učinci ionizirajućih zračenja u materijalima[120481] Branka Mihaljević098-0982904-2954MZOS
Depositing User: Željka Knežević Medija
Date Deposited: 07 May 2015 13:24
Last Modified: 07 May 2015 13:24
URI: http://fulir.irb.hr/id/eprint/1835
DOI: 10.1016/j.radmeas.2011.01.012

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