Correlation of optically and thermally stimulated luminescence of natural fluorite pellets |
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| Affiliation: | 1. Nuclear Engineering Unit, Ben Gurion University of the Negev, Beersheva, Israel;2. Radiation Safety Division, Soreq Nuclear Research Center, Yavne, Israel;3. Physics Unit, Sami Shamoon College of Engineering, Beersheva, Israel;4. Center for Medical Radiation Physics, University of Wollongong, Wollongong, Australia;5. Illawarra Cancer Care Center, Wollongong Hospital, Wollongong, Australia;6. Physics Department, Ben Gurion University of the Negev, Beersheva, Israel;1. Cukurova University, Arts-Sciences Faculty, Physics Department, 01330 Adana, Turkey;2. CIEMAT, Av. Complutense 22, 28040 Madrid, Spain;3. Museo Nacional de Ciencias Naturales, (CSIC), C/José Gutiérrez Abascal 2, 28006 Madrid, Spain;1. Instituto Nacional de Investigaciones Nucleares, Carr. México-Toluca S/N, La Marquesa Ocoyoacac, C.P. 52752 Estado de Mexico, Mexico;2. Departamento de Ingeniería en Metalurgia y Materiales, Escuela Superior de Ingeniería Química e Industrias Extractivas, Instituto Politécnico Nacional, UPALM, Av. IPN s/n, C.P. 07738 CdMx, Mexico;1. Faculty of Physics, University of Kashan, Kashan, Iran;2. Institute of Nanosince and Nanotechnology, University of Kashan, Kashan, Iran |
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| Abstract: | Natural fluorite (CaF2), a dosimetric material of large usage, presents Thermoluminescence (TL) and Optically Stimulated Luminescence (OSL). This study examined the behavior of TL and OSL (stimulated with Blue LEDs) signals from the Brazilian natural fluorite pellets with NaCl as binding agent, as well as their correlations, in order to study and optimize the dosimetric process with this material. A series of experiments were conducted, basically with thermal treatments before OSL acquisition, and optical bleaching before TL readout. The role of NaCl in the TL and OSL emission was investigated. It was observed that natural CaF2 TL signal is still ample to be used in dosimetric applications, as dose re-assessment in personal dosimetry after an OSL measurement. Also it was verified that the fluorite OSL signal is extinguished by a 350 °C heating and that NaCl has no contribution to the stable part of the OSL signal. |
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| Keywords: | Optically stimulated luminescence Thermoluminescence Natural fluorite |
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