Structural, optical and dosimetric characterization of CaSO4:Tb, CaSO4:Tb, Ag and CaSO4:Tb,Ag(NP)

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dc.contributor.authorSILVA, ANDERSON M.B.pt_BR
dc.contributor.authorJUNOT, DANILO O.pt_BR
dc.contributor.authorCALDAS, LINDA V.E.pt_BR
dc.contributor.authorSOUZA, DIVANIZIA N.pt_BR
dc.coverageInternacionalpt_BR
dc.date.accessioned2020-09-29T19:50:43Z
dc.date.available2020-09-29T19:50:43Z
dc.date.issued2020pt_BR
dc.description.abstractThe proposal of this work was to produce and characterize CaSO4 crystals doped with terbium and silver nanoparticles for use in thermoluminescent (TL) and optically stimulated luminescent (OSL) dosimetry. The crystalline structure, morphology and optical properties of the phosphors were characterized by X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy, and photoluminescence. The viability of the slow evaporation route used in the production was confirmed. The silver nanoparticles (Ag(NPs)) were prepared by the method proposed by Lee and Meisel and characterized by XRD and visible absorption spectroscopy (UV–Vis). The composites were obtained from the addition of Teflon to the phosphors. Through the analyses, it was observed that the presence of silver nanoparticles slightly increases the intensity of the emission of the phosphor and shifts the dosimetric TL peak from 185 °C to 310 °C, at a heating rate of 10 °C/s. The samples presented a typical exponential OSL decay curve with a very slow component (τ3 ≥ 152 s) that indicates that the traps have a low photoionization cross-section for blue LEDs. CaSO4:Tb,Ag(NP) presented a higher sensitivity to radiation than CaSO4:Tb,Ag. The lowest detectable dose (LDD) and the fading of the TL signal of the composites were also evaluated. All samples presented a luminescent signal reproducible and linear, with TL and OSL responses proportional to the absorbed doses in the range of 169 mGy to 10 Gy.pt_BR
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)pt_BR
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorshipIDCAPES: 23038.007416/2012-79pt_BR
dc.description.sponsorshipIDCNPq: 150678/2017-7; 301335/2016–8; 308090/2016-0pt_BR
dc.format.extent1-12pt_BR
dc.identifier.citationSILVA, ANDERSON M.B.; JUNOT, DANILO O.; CALDAS, LINDA V.E.; SOUZA, DIVANIZIA N. Structural, optical and dosimetric characterization of CaSO4:Tb, CaSO4:Tb, Ag and CaSO4:Tb,Ag(NP). <b>Journal of Luminescence</b>, v. 224, p. 1-12, 2020. DOI: <a href="https://dx.doi.org/10.1016/j.jlumin.2020.117286">10.1016/j.jlumin.2020.117286</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/31402.
dc.identifier.doi10.1016/j.jlumin.2020.117286pt_BR
dc.identifier.issn0022-2313pt_BR
dc.identifier.orcid0000-0002-7362-2455pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-7362-2455
dc.identifier.percentilfi76.26pt_BR
dc.identifier.percentilfiCiteScore79.20
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/31402
dc.identifier.vol224pt_BR
dc.relation.ispartofJournal of Luminescencept_BR
dc.rightsopenAccesspt_BR
dc.subjectcalcium sulfates
dc.subjectterbium
dc.subjectsilver
dc.subjection dosimetry
dc.subjection beams
dc.subjectdosimetry
dc.subjectthermoluminescence
dc.subjectphotoluminescence
dc.subjectionizing radiations
dc.subjectnanostructures
dc.subjectemission spectra
dc.titleStructural, optical and dosimetric characterization of CaSO4:Tb, CaSO4:Tb, Ag and CaSO4:Tb,Ag(NP)pt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorLINDA V. E. CALDAS
ipen.autorDANILO OLIVEIRA JUNOT
ipen.codigoautor1495
ipen.codigoautor9400
ipen.contributor.ipenauthorLINDA V. E. CALDAS
ipen.contributor.ipenauthorDANILO OLIVEIRA JUNOT
ipen.date.recebimento20-09
ipen.identifier.fi3.599pt_BR
ipen.identifier.fiCiteScore6.1
ipen.identifier.ipendoc27176pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.range.fi3.000 - 4.499
ipen.range.percentilfi75.00 - 100.00
ipen.type.genreArtigo
relation.isAuthorOfPublication7f46d4f4-dfd6-4485-a767-10df5b4f4f13
relation.isAuthorOfPublication79a720c5-e5ed-4df1-b034-dee1a2d2baeb
relation.isAuthorOfPublication.latestForDiscovery79a720c5-e5ed-4df1-b034-dee1a2d2baeb
sigepi.autor.atividadeCALDAS, LINDA V.E.:1495:330:Npt_BR
sigepi.autor.atividadeJUNOT, DANILO O.:9400:330:Npt_BR
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