JUNOT, DANILO O.SANTOS, ANA G.M.ANTONIO, PATRICIA L.REZENDE, MARCOS V.S.SOUZA, DIVANIZIA N.CALDAS, LINDA V.E.2019-08-092019-08-092019JUNOT, DANILO O.; SANTOS, ANA G.M.; ANTONIO, PATRICIA L.; REZENDE, MARCOS V.S.; SOUZA, DIVANIZIA N.; CALDAS, LINDA V.E. Dosimetric and optical properties of CaSO4:Tm and CaSO4:Tm,Ag crystals produced by a slow evaporation route. <b>Journal of Luminescence</b>, v. 210, p. 58-65, 2019. DOI: <a href="https://dx.doi.org/10.1016/j.jlumin.2019.02.005">10.1016/j.jlumin.2019.02.005</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/30062.0022-2313http://repositorio.ipen.br/handle/123456789/30062The motivation of this work was to produce TL dosimeters based on crystals of CaSO4 doped with thulium and silver, by means of a suitable new route. The crystals were produced by an adaptation of the slow evaporation route using calcium carbonate (CaCO3) as precursor, and incorporating the dopants (Tm2O3 and silver nanoparticles) in a solution of sulfuric acid, which is evaporated resulting in CaSO4:Tm or CaSO4:Tm,Ag crystal powders. X-ray diffraction analyses showed that the produced samples exhibit only a single phase corresponding to the crystal structure of anhydrite. Optical characterization was performed to determine the band gap of the materials. Samples did not show a reasonable OSL signal after stimulation with blue LEDs. TL characteristics such as glow curves, linearity and reproducibility of response, minimum detectable dose and fading were evaluated. The CaSO4:Tm samples showed TL emission glow curves with peaks in temperatures proper for dosimetry. The CaSO4:Tm,Ag samples presented a very intense peak displaced to high temperatures that could only be observed by applying heating rates below 4 °C/s. Samples doped with thulium oxide and silver nanoparticles showed the highest TL intensity and lowest fading.58-65openAccessdosimetrythermoluminescencecrystalscalcium sulfatesthermoluminescent dosimetrythulium oxidessilvercalcium carbonatesArtigo de periódico21010.1016/j.jlumin.2019.02.0050000-0002-7362-2455https://orcid.org/0000-0002-7362-245578.86678.60