Produção e caracterização de sistemas vítreos de boratos de magnésio para aplicação em dosimetria
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFS |
Texto Completo: | https://ri.ufs.br/jspui/handle/riufs/15705 |
Resumo: | In this work, magnesium borate glasses with different concentrations were synthesized, resulting in the matrix systems: 80% MgB2O4 and 20% MgB4O7 (80MgB2O4-20MgB4O7) (mass%) and 60% MgB2O4 and 40% MgB4O7 (60MgB2O4-40MgB4O7). The glass samples were produced by the melting and rapid cooling method. The samples were doped with Ce (CO3)2, in the proportion of 0.1% to 0.9% to the total mass of compounds. Li2CO3 co-dopant was added to the matrix at a ratio of 0.1% to the total mass of 80MBO and 60MBO.The structural characterization of borate glasses was performed by X-ray diffraction (XRD), absorption spectroscopy techniques. UV-Vis and photoluminescence (PL). The XRD results have confirmed the amorphous nature of the investigated glasses, and UV-Vis spectra showed a tendency to increase the wavelength cut-off due to the addition of Ce3+, which can be associated to some structural alteration. The dosimetric characterization was carried out by the thermoluminescence (TL) and optically stimulated luminescence (OSL) technique.TL and OSL characteristics of the glasses were evaluated, such as glow curve, dose-response curve, sensitivity, linearity and energy dependence, after exposure of the samples to ionizing radiation (x-rays and gamma radiation). The dose response curves TL and OSL of the glasses showed a linear behavior in the studied dose range (0.25 to 1.0 Gy). Among the studied doped magnesium borate glasses, those with the highest concentration of Ce3+ (0.9%), co-doped with 0.1% Li, exhibited the highest TL and OSL sensitivities. The results of this work confirm the possibility of using these glasses in dosimetry. |
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Barrera, Gerardo RiveraSouza, Divanízia do Nascimento2022-05-16T23:32:04Z2022-05-16T23:32:04Z2019-11-01BARRERA, Gerardo Rivera. Produção e caracterização de sistemas vítreos de boratos de magnésio para aplicação em dosimetria. 2019. 112 f. Tese (Doutorado em Física) - Universidade Federal de Sergipe, São Cristóvão, 2019.https://ri.ufs.br/jspui/handle/riufs/15705In this work, magnesium borate glasses with different concentrations were synthesized, resulting in the matrix systems: 80% MgB2O4 and 20% MgB4O7 (80MgB2O4-20MgB4O7) (mass%) and 60% MgB2O4 and 40% MgB4O7 (60MgB2O4-40MgB4O7). The glass samples were produced by the melting and rapid cooling method. The samples were doped with Ce (CO3)2, in the proportion of 0.1% to 0.9% to the total mass of compounds. Li2CO3 co-dopant was added to the matrix at a ratio of 0.1% to the total mass of 80MBO and 60MBO.The structural characterization of borate glasses was performed by X-ray diffraction (XRD), absorption spectroscopy techniques. UV-Vis and photoluminescence (PL). The XRD results have confirmed the amorphous nature of the investigated glasses, and UV-Vis spectra showed a tendency to increase the wavelength cut-off due to the addition of Ce3+, which can be associated to some structural alteration. The dosimetric characterization was carried out by the thermoluminescence (TL) and optically stimulated luminescence (OSL) technique.TL and OSL characteristics of the glasses were evaluated, such as glow curve, dose-response curve, sensitivity, linearity and energy dependence, after exposure of the samples to ionizing radiation (x-rays and gamma radiation). The dose response curves TL and OSL of the glasses showed a linear behavior in the studied dose range (0.25 to 1.0 Gy). Among the studied doped magnesium borate glasses, those with the highest concentration of Ce3+ (0.9%), co-doped with 0.1% Li, exhibited the highest TL and OSL sensitivities. The results of this work confirm the possibility of using these glasses in dosimetry.Neste trabalho foram sintetizados vidros de borato de magnésio com diferentes concentrações, que resultaram nos sistemas matriciais 80%MgB2O4 e 20%MgB4O7 (80MgB2O4-20MgB4O7) (% em massa) e 60%MgB2O4 e 40%MgB4O7 (60MgB2O4- 40MgB4O7). Esses vidros foram produzidos pelo método de fusão e resfriamento rápido. As amostras de vidro foram dopadas com Ce(CO3)2, na proporção de 0,1% a 0,9% de massa total dos compostos. O co-dopante Li2CO3 foi adicionado às matrizes na proporção de 0,1% em relação à massa total do 80MBO e 60MBO.A caracterização estrutural dos vidros de borato foi realizada empregando as técnicas de difratometria de raios X (DRX), espectroscopia de absorção UV-Vis e fotoluminescência (PL). As análises de DRX confirmaram a natureza amorfa dos vidros investigados e as análises UV-vis mostraram uma tendência a um aumento do comprimento de onda de corte com a adição de Ce3+, o que pode estar associado à alguma alteração estrutural dos vidros. A caracterização dosimétrica foi realizada utilizando a técnica de termoluminescência (TL) e luminescência opticamente estimulada (OSL). Foram avaliadas características TL e OSL dos vidros, como curva de emissão, curva dose-resposta, sensibilidade, linearidade e dependência energética, após exposição das amostras a radiação ionizante (radiação X e gama). As curvas dose-resposta TL e OSL dos vidros estudados mostraram um comportamento linear no intervalo de doses estudado (0,25 a 1,0 Gy). Entre os vidros de borato de magnésio dopados produzidos, aqueles com maior concentração de Ce3+ (0,9%), co-dopados com 0,1% de Li, exibiram as maiores sensibilidades TL e OSL. Os resultados obtidos confirmam possibilidade de uso desses vidros em dosimetria.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESSão CristóvãoporFísicaVidro de borato de magnésioCaracterização estruturalTermoluminescência (TL)Luminescência opticamente estimulada (OSL)DosimetriaMagnesium borate glassStructural characterizationDosimetryThermoluminescence (TL)Optically stimulated luminescence (OSL)CIENCIAS EXATAS E DA TERRA::FISICAProdução e caracterização de sistemas vítreos de boratos de magnésio para aplicação em dosimetriainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisPós-Graduação em FísicaUniversidade Federal de Sergipereponame:Repositório Institucional da UFSinstname:Universidade Federal de Sergipe (UFS)instacron:UFSinfo:eu-repo/semantics/openAccessLICENSElicense.txtlicense.txttext/plain; charset=utf-81475https://ri.ufs.br/jspui/bitstream/riufs/15705/1/license.txt098cbbf65c2c15e1fb2e49c5d306a44cMD51ORIGINALGERARDO_RIVERA_BARRERA.pdfGERARDO_RIVERA_BARRERA.pdfapplication/pdf2647295https://ri.ufs.br/jspui/bitstream/riufs/15705/2/GERARDO_RIVERA_BARRERA.pdfd051138a7ff6b332925c92b6017e464fMD52TEXTGERARDO_RIVERA_BARRERA.pdf.txtGERARDO_RIVERA_BARRERA.pdf.txtExtracted texttext/plain203040https://ri.ufs.br/jspui/bitstream/riufs/15705/3/GERARDO_RIVERA_BARRERA.pdf.txtef2c5a46a8388d4fb207c426f3f781e6MD53THUMBNAILGERARDO_RIVERA_BARRERA.pdf.jpgGERARDO_RIVERA_BARRERA.pdf.jpgGenerated Thumbnailimage/jpeg1497https://ri.ufs.br/jspui/bitstream/riufs/15705/4/GERARDO_RIVERA_BARRERA.pdf.jpg5d5f8afcbb7bfc7c05c525d3fdd718daMD54riufs/157052022-05-16 20:32:04.129oai:ufs.br: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Repositório InstitucionalPUBhttps://ri.ufs.br/oai/requestrepositorio@academico.ufs.bropendoar:2022-05-16T23:32:04Repositório Institucional da UFS - Universidade Federal de Sergipe (UFS)false |
dc.title.pt_BR.fl_str_mv |
Produção e caracterização de sistemas vítreos de boratos de magnésio para aplicação em dosimetria |
title |
Produção e caracterização de sistemas vítreos de boratos de magnésio para aplicação em dosimetria |
spellingShingle |
Produção e caracterização de sistemas vítreos de boratos de magnésio para aplicação em dosimetria Barrera, Gerardo Rivera Física Vidro de borato de magnésio Caracterização estrutural Termoluminescência (TL) Luminescência opticamente estimulada (OSL) Dosimetria Magnesium borate glass Structural characterization Dosimetry Thermoluminescence (TL) Optically stimulated luminescence (OSL) CIENCIAS EXATAS E DA TERRA::FISICA |
title_short |
Produção e caracterização de sistemas vítreos de boratos de magnésio para aplicação em dosimetria |
title_full |
Produção e caracterização de sistemas vítreos de boratos de magnésio para aplicação em dosimetria |
title_fullStr |
Produção e caracterização de sistemas vítreos de boratos de magnésio para aplicação em dosimetria |
title_full_unstemmed |
Produção e caracterização de sistemas vítreos de boratos de magnésio para aplicação em dosimetria |
title_sort |
Produção e caracterização de sistemas vítreos de boratos de magnésio para aplicação em dosimetria |
author |
Barrera, Gerardo Rivera |
author_facet |
Barrera, Gerardo Rivera |
author_role |
author |
dc.contributor.author.fl_str_mv |
Barrera, Gerardo Rivera |
dc.contributor.advisor1.fl_str_mv |
Souza, Divanízia do Nascimento |
contributor_str_mv |
Souza, Divanízia do Nascimento |
dc.subject.por.fl_str_mv |
Física Vidro de borato de magnésio Caracterização estrutural Termoluminescência (TL) Luminescência opticamente estimulada (OSL) Dosimetria |
topic |
Física Vidro de borato de magnésio Caracterização estrutural Termoluminescência (TL) Luminescência opticamente estimulada (OSL) Dosimetria Magnesium borate glass Structural characterization Dosimetry Thermoluminescence (TL) Optically stimulated luminescence (OSL) CIENCIAS EXATAS E DA TERRA::FISICA |
dc.subject.eng.fl_str_mv |
Magnesium borate glass Structural characterization Dosimetry Thermoluminescence (TL) Optically stimulated luminescence (OSL) |
dc.subject.cnpq.fl_str_mv |
CIENCIAS EXATAS E DA TERRA::FISICA |
description |
In this work, magnesium borate glasses with different concentrations were synthesized, resulting in the matrix systems: 80% MgB2O4 and 20% MgB4O7 (80MgB2O4-20MgB4O7) (mass%) and 60% MgB2O4 and 40% MgB4O7 (60MgB2O4-40MgB4O7). The glass samples were produced by the melting and rapid cooling method. The samples were doped with Ce (CO3)2, in the proportion of 0.1% to 0.9% to the total mass of compounds. Li2CO3 co-dopant was added to the matrix at a ratio of 0.1% to the total mass of 80MBO and 60MBO.The structural characterization of borate glasses was performed by X-ray diffraction (XRD), absorption spectroscopy techniques. UV-Vis and photoluminescence (PL). The XRD results have confirmed the amorphous nature of the investigated glasses, and UV-Vis spectra showed a tendency to increase the wavelength cut-off due to the addition of Ce3+, which can be associated to some structural alteration. The dosimetric characterization was carried out by the thermoluminescence (TL) and optically stimulated luminescence (OSL) technique.TL and OSL characteristics of the glasses were evaluated, such as glow curve, dose-response curve, sensitivity, linearity and energy dependence, after exposure of the samples to ionizing radiation (x-rays and gamma radiation). The dose response curves TL and OSL of the glasses showed a linear behavior in the studied dose range (0.25 to 1.0 Gy). Among the studied doped magnesium borate glasses, those with the highest concentration of Ce3+ (0.9%), co-doped with 0.1% Li, exhibited the highest TL and OSL sensitivities. The results of this work confirm the possibility of using these glasses in dosimetry. |
publishDate |
2019 |
dc.date.issued.fl_str_mv |
2019-11-01 |
dc.date.accessioned.fl_str_mv |
2022-05-16T23:32:04Z |
dc.date.available.fl_str_mv |
2022-05-16T23:32:04Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
BARRERA, Gerardo Rivera. Produção e caracterização de sistemas vítreos de boratos de magnésio para aplicação em dosimetria. 2019. 112 f. Tese (Doutorado em Física) - Universidade Federal de Sergipe, São Cristóvão, 2019. |
dc.identifier.uri.fl_str_mv |
https://ri.ufs.br/jspui/handle/riufs/15705 |
identifier_str_mv |
BARRERA, Gerardo Rivera. Produção e caracterização de sistemas vítreos de boratos de magnésio para aplicação em dosimetria. 2019. 112 f. Tese (Doutorado em Física) - Universidade Federal de Sergipe, São Cristóvão, 2019. |
url |
https://ri.ufs.br/jspui/handle/riufs/15705 |
dc.language.iso.fl_str_mv |
por |
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por |
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openAccess |
dc.publisher.program.fl_str_mv |
Pós-Graduação em Física |
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Universidade Federal de Sergipe |
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