Investigation of dosimetric properties of CaSO4:Mn phosphor prepared using slow evaporation route
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Applied Radiation and Isotopes
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The objective of this work was to investigate the luminescent properties of CaSO4:Mn synthesized by slow
evaporation route. The crystalline structure, morphology, thermal and optical properties of the phosphors were
characterized by X-ray diffraction analysis (XRD), Scanning electron microscopy (SEM), photoluminescence (PL)
and thermogravimetric analysis (TGA). Moreover, using thermoluminescence (TL) and optically stimulated
luminescence (OSL) techniques, the dosimetric properties of the phosphors, such as emission spectra, glow curve
reproducibility, dose-response linearity, fading of the luminescent signal, variation of the TL intensity with the
heating rate, OSL decay curves, correlation between TL and OSL emissions and minimum detectable dose (MDD)
were comprehensively investigated. For dosimetric analyses, the samples were irradiated with doses from 169
mGy to 10 Gy. The emission band fits with the characteristic line of the Mn2+ emission features, ascribed to 6
A1→4
T1 transition. CaSO4:Mn pellets present a TL glow curve with a single typical peak centered around 494
nm, an OSL decay curve with predominance of a fast decay component, and a MDD on the order of mGy. The
luminescent signals showed to be linear and reproducible in the studied dose range. The trapping centers located
between 0.83 eV and 1.07 eV were revealed for different heating rates in the TL study. The high TL sensitivity of
CaSO4:Mn was proven when comparing with commercially available dosimeters. The luminescent signals exhibit
a smaller fading than described in the literature for CaSO4:Mn produced by other methods.
Como referenciar
SILVA, ANDERSON M.B.; RODRIGUES, DANIEL S.; ANTONIO, PATRICIA L.; JUNOT, DANILO O.; CALDAS, LINDA V.E.; SOUZA, DIVANIZIA N. Investigation of dosimetric properties of CaSO4:Mn phosphor prepared using slow evaporation route. Applied Radiation and Isotopes, v. 199, p. 1-9, 2023. DOI: 10.1016/j.apradiso.2023.110874. Disponível em: http://repositorio.ipen.br/handle/123456789/34207. Acesso em: 20 Mar 2026.
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