CaSO4:Ce,Mn: A novel, highly sensitive TL/OSL phosphor synthesized via the slow evaporation method
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2024
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INTERNATIONAL SYMPOSIA ON RADIATION PHYSICS, 19th
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In this study, a new CaSO4 crystal doped with cerium and manganese is described and its potential
for dosimetric applications is evaluated. Cerium and manganese were incorporated into CaSO4 at a
concentration of 0.1 mol% each. The crystal growth parameters were established based on previous
studies [1-2], utilizing the slow evaporation route and were prepared in pellet form with the addition
of Teflon. The crystalline structure and optical properties of the crystals were analyzed using X-ray
diffraction (XRD) and photoluminescence (PL) techniques. In addition, thermoluminescence (TL)
and optically stimulated luminescence (OSL) were used to comprehensively investigate the
dosimetric properties of the phosphors, such as the TL glow curve and continuous wave OSL (CWOSL) curves, dose-response and its reproducibility, fading, sensitivity, variation of TL intensity with
the heating rate, correlation between TL and OSL emissions, and determination of the minimum
detectable dose (MDD). The phosphor was synthesized efficiently using a slow evaporation route,
with results from both PL and TL emission spectra confirming the presence of dopant ions in the
crystal matrix. At a heating rate of 5 °C/s, the CaSO4:Ce,Mn samples exhibited a TL emission curve
at 145°C, characterized by three overlapping peaks. The samples showed a typical exponential OSL
decay curve with a predominant fast decay component, indicating that the charge traps have a high
photoionization cross-section for blue LEDs. The luminescent signals exhibited linearity and
reproducibility within the investigated dose range (169 mGy–100 Gy). Furthermore, the
incorporation of cerium as a co-dopant in the CaSO4:Mn matrix resulted in a notable increase in
TL/OSL sensitivity, showing potential compared to mono-doped CaSO4 dosimeters [2] and
commercially available alternatives.
Como referenciar
SILVA, A.M.B.; ANTONIO, P.L.; JUNOT, D.O.; CALDAS, L.V.D.; SOUZA, D.N. CaSO4:Ce,Mn: A novel, highly sensitive TL/OSL phosphor synthesized via the slow evaporation method. In: PESSANHA, SOFIA (ed.); MANSO, MARTA (ed.). In: INTERNATIONAL SYMPOSIA ON RADIATION PHYSICS, 19th, September 1-5, 2024, Lisbon, Portugal. Abstract... Lisbon: Universidade Nova de Lisboa - Faculdade de Ciências e Tecnologia, Lisboa, 2024. p. 46-46. Disponível em: https://repositorio.ipen.br/handle/123456789/48966. Acesso em: 30 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.