Luminescent and dosimetric properties of CaSO4:RE,Mn (RE = Dy, Tb, Tm, Yb, Eu, Ce) phosphors synthesized by the slow evaporation method
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Radiation Measurements
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This study investigates the luminescent and dosimetric properties of CaSO4:Dy,Mn, CaSO4:Tb,Mn, CaSO4:Tm,Mn, CaSO4:Yb,Mn, CaSO4:Eu,Mn and CaSO4:Ce,Mn composites synthesized via the slow evaporation route. Structural and compositional characterization was performed using X-ray diffraction (XRD) and energy-dispersive spectroscopy (EDS). The dosimetric performance of the materials was evaluated using Teflon-based pellets through thermoluminescence (TL) glow curve measurements. Additionally, Continuous Wave Optically Stimulated Luminescence (CW-OSL) measurements were conducted to assess their optical stimulation behavior. The TL emission spectra revealed characteristic transitions associated with both RE3+ and Mn2+ ions, with emission features strongly dependent on the specific dopant. The TL glow curves exhibited well-defined peaks in the UV and visible regions, with Tm,Mn, Dy,Mn and Tb,Mn codoped samples showing enhanced emissions at higher temperatures, a desirable feature for dosimetric applications. CW-OSL measurements demonstrated intense luminescence responses, particularly for the CaSO4:Tm,Mn and CaSO4:Ce,Mn compositions. A comprehensive dosimetric evaluation was conducted, including reproducibility, linearity and signal fading. Among the studied samples, CaSO4:Tm,Mn exhibited the most stable TL response, while CaSO4:Dy,Mn showed the superior OSL signal stability. Overall, the results demonstrate that these newly developed CaSO4-based RE,Mn composites possess excellent dosimetric characteristics, highlighting their strong potential as TL/OSL radiation detectors.
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SILVA, ANDERSON M. B.; JUNOT, DANILO O.; TRINDADE, NEILO M.; SOUZA, DIVANIZIA N.; CALDAS, LINDA V. E. Luminescent and dosimetric properties of CaSO4:RE,Mn (RE = Dy, Tb, Tm, Yb, Eu, Ce) phosphors synthesized by the slow evaporation method. Radiation Measurements, v. 192, p. 1-8, 2026. DOI: 10.1016/j.radmeas.2026.107624. Disponível em: https://repositorio.ipen.br/handle/123456789/50194. Acesso em: 28 Oct 2026.
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