Thermoluminescence and optically stimulated luminescence of CaSO4:Mn,Tb with different dopant concentrations
Carregando...
Data
Data de publicação
Autores IPEN
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Radiation Physics and Chemistry
Exportar
Resumo
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),
exploring CaSO4:Mn,Tb crystals at a concentration of 0.1 mol %, validating their properties for dosimetric
purposes. A structural phase identification was conducted using X-ray diffraction and energy-dispersive spectroscopy
(EDS) spectra confirming 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, in both visible and UV regions. Conversely, at a constant terbium
concentration, increasing Mn2+ concentration enhanced the sensitivity of low-temperature TL traps in the visible
region. However, at higher Mn concentrations, such as 1 % and 2 %, TL intensity in deeper traps decreased. In the
UV region, TL signals remained stable as the concentration of Mn2+ increased from 0.1 % to 0.5 %, with only a
slight shift in peak temperatures. Concentrations above 1 % led to a decrease in TL intensity. All samples produced
suitable OSL curves. Fixing Mn2+ at 1 mol % and decreasing Tb3+ concentration also resulted in increased
OSL signals. The optimal Mn2+ concentration, with Tb3+ fixed at 0.1 mol %, was found to be at 0.1 mol %, where
OSL sensitivity was maximized. 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. Radiation Physics and Chemistry, v. 237, p. 1-8, 2025. DOI: 10.1016/j.radphyschem.2025.113032. Disponível em: https://repositorio.ipen.br/handle/123456789/49346. Acesso em: 20 Mar 2026.
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.