Characterization of the glow-peak fading properties of six common thermoluminescent materials |
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| Authors: | John A Harvey Nathan P Haverland Kimberlee J Kearfott |
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| Institution: | 1. Science and Engineering Faculty, Queensland University of Technology, Brisbane 4000, Australia;2. Radiotherapy Physics, Queen Alexandra Hospital, Portsmouth PO6 3LY, UK;3. Centre for Nuclear and Radiation Physics, University of Surrey, Guildford GU2 7XH, UK;4. Cancer Care Services, Royal Brisbane and Women''s Hospital, Brisbane 4029, Australia;1. Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam-603102, India;2. Materials Physics Division, Indira Gandhi Centre for Atomic Research, Kalpakkam-603102, India;3. Central Leather Research Institute, Council of Scientific and Industrial Research, Chennai, India;1. Centre for Nuclear and Radiation Physics, Department of Physics, University of Surrey, Guildford, Surrey, GU2 7XH, UK;2. Radiology Department, Faculty of Medicine, Kabul Medical University, Kabul, Afghanistan;3. Radiotherapy Physics, Level B, Queen Alexandra Hospital, Portsmouth, PO6 3LY, UK;4. Department of Medical Physics, Royal Surrey County Hospital NHS Trust, Guildford, Surrey, GU2 7XX, UK;5. Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia |
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| Abstract: | The pre-irradiation and post-irradiation fading rates of the thermoluminescent glow peaks of six commonly used thermoluminescent dosimeters under controlled environmental conditions over approximately 30 d are examined. Glow peaks were fit to the first-order kinetics model using a computerized glow curve deconvolution program. Dosimeters studied were LiF:Mg,Ti, CaF2:Dy, CaF2:Tm, CaF2:Mn, LiF:Mg,Cu,P, and CaSO4:Dy. LiF:Mg,Ti and LiF:Mg,Cu,P experienced significant pre-irradiation fading. All types except CaF2:Mn experienced post-irradiation fading. Ratios of glow-peak areas were fit to exponential decay functions when possible. |
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