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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:25 |
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Conference: Bucharest University Faculty of Physics 2010 Meeting
Section: Polymer Physics
Title:
Dosimetric characteristics of tissue equivalent thermoluminescent detectors based on lithium fluoride
Authors:
C. Cherestes (1), Margareta Cherestes (1), Livia Maria Constantinescu (2)
Affiliation:
(1) - S.C. DOZIMED S.R.L, Dosimetry Lab, 405 Atomistilor Str., 077125 Magurele, Ilfov, Romania
(2) University of Bucharest, Faculty of Physics, P.O.BOX.MG-11, Bucharest, Romania
E-mail
codrut.cherestes@dozimed.ro
Keywords:
thermoluminescent detectors, TL dosimetry, lithium fluoride, glow curve
Abstract:
The principle of application of luminescence materials to the dosimetry of ionizing radiation relies on the relationship between the dose absorbed and the intensity of light emitted. Three groups of luminescence detectors are applied in personal dosimetry: thermoluminescence detectors (TLD), detectors based of Optically Stimulated Luminescence (OSL) and radiophotoluminescence (RPL) glasses. The major advantages of luminescence dosemeters are their high sensitivity, allowing doses as low as 0.01 mGy to be measured; their linear response with dose up to at least 1 Gy, their good energy response after X-ray irradiation (for materials with Zeff close to that of tissue), their reusability and their resistance to high humidity and to high magnetic fields. This paper presents the main dosimetric characteristics of tissue-equivalent thermoluminescent dosimeters based on lithium fluoride (LiF:Mg, Ti). The dosimetric characteristics of the thermoluminescent dosimeters examined include glow-curve shapes, photon dose response, minimum detectable dose, relative photon energy response, fading and reproducibility and uncertainty evaluation of dose measurements.
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