Thermoluminescence and Optically Stimulated Luminescence of CaSO4:Mn,Tb with different dopant concentrations
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2024
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INTERNATIONAL SYMPOSIA ON RADIATION PHYSICS, 19th
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This study systematically evaluates the thermoluminescence (TL) and optically stimulated
luminescence (OSL) properties of CaSO4 crystals doped with manganese (Mn) and terbium (Tb),
focusing on dopant concentrations within the ranges of Mn (0.1 mol% – 2 mol%) and Tb
(0.05 mol% – 1 mol%). Synthesized via the slow evaporation route, this investigation is part of an
ongoing experimental series initiated by Silva et al. (2022) [1], exploring CaSO4:Mn,Tb crystals at a
concentration of 0.1 mol%, the validating their properties for dosimetric purposes. A structural phase
identification was conducted using X-ray diffraction, and emission and excitation photoluminescence
(PL) spectra confirmed the presence of Tb3+ and Mn2+ ions in the crystalline matrices. Dosimetric
characterization utilized pellets prepared by incorporating Teflon into the phosphors. In-depth
investigations involved analyzing TL glow curves and Continuous Wave Optically Stimulated
Luminescence (CW-OSL) curves. Observations revealed that TL intensity increased as the co-doped
concentration of Tb decreased while maintaining the concentration of Mn constant. Conversely, at a
constant terbium concentration, TL intensity was higher with 0.5 mol% of manganese compared to
0.1 mol%, but higher concentrations of manganese (1 mol% and 2 mol%) resulted in decreased TL
intensity. The study also explored dose-response, reproducibility, fading, sensitivity, step-annealing
curve analyses, experimental determination of temperature dependence, and the minimum detectable
dose (MDD) exposed to beta radiation of the pellets. This research underscores the importance of
optimizing dopant concentrations to enhance the potential of these phosphors for precise and reliable
dosimetry, thereby advancing both the understanding of these materials and their potential for further
development in the field of radiation dosimetry.
Como referenciar
SILVA, A.M.B.; SOUZA, D.N.; CALDAS, L.V.E. Thermoluminescence and Optically Stimulated Luminescence of CaSO4:Mn,Tb with different dopant concentrations. In: PESSANHA, SOFIA (ed.); MANSO, MARTA (ed.). In: INTERNATIONAL SYMPOSIA ON RADIATION PHYSICS, 19th, September 1-5, 2024, Lisbon, Portugal. Abstract... Lisbon, Portugal: Universidade Nova de Lisboa - Faculdade de Ciências e Tecnologia, 2024. p. 45-45. Disponível em: https://repositorio.ipen.br/handle/123456789/48972. Acesso em: 31 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.