Thermoluminescent properties of LaAlO3:C crystals synthesized by solid state reaction applied to UV Dosimetry
In this work we have investigated the thermoluminescent (TL) response of carbon doped lanthanum aluminate crystals grown by solid state reaction method. We conducted three syntheses by different combinations of Al2O3, La2O3 and 0.1 wt % of carbon atoms. The 1:1 mixture of aluminum and lanthanum oxid...
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Brazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR)
2019-02-01
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| Series: | Brazilian Journal of Radiation Sciences |
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| Online Access: | https://bjrs.org.br/revista/index.php/REVISTA/article/view/602 |
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| author | neriene alves wilmar barbosa ferraz Luiz oliveira Faria |
| author_facet | neriene alves wilmar barbosa ferraz Luiz oliveira Faria |
| author_sort | neriene alves |
| collection | DOAJ |
| description | In this work we have investigated the thermoluminescent (TL) response of carbon doped lanthanum aluminate crystals grown by solid state reaction method. We conducted three syntheses by different combinations of Al2O3, La2O3 and 0.1 wt % of carbon atoms. The 1:1 mixture of aluminum and lanthanum oxide was mixed with 0.1wt.% carbon and annealed at 1700°C for two hours in a hydrogen atmosphere. The X-ray diffraction analysis revealed the formation of the rhombohedral LaAlO3 crystallographic phase. F and F + centers were identified by ultraviolet-visible spectroscopy. Fourier transform infrared spectroscopic data show higher and lower frequencies assigned to AlO6 octahedra in LaAlO3. The UV irradiations were carried out using a commercial 8W UV lamp. Thermoluminescence measurements were performed at a Harshaw 4500 TL reader. The three syntheses were very efficient to obtain carbon doped LaAlO3 crystals with high thermoluminescent output, for low exposure rates of UVR fields. |
| format | Article |
| id | doaj-art-2100a9214f1b448c9b91bf2e2dbed583 |
| institution | Kabale University |
| issn | 2319-0612 |
| language | English |
| publishDate | 2019-02-01 |
| publisher | Brazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR) |
| record_format | Article |
| series | Brazilian Journal of Radiation Sciences |
| spelling | doaj-art-2100a9214f1b448c9b91bf2e2dbed5832025-08-20T03:51:04ZengBrazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR)Brazilian Journal of Radiation Sciences2319-06122019-02-0172A (Suppl.)10.15392/bjrs.v7i2A.602461Thermoluminescent properties of LaAlO3:C crystals synthesized by solid state reaction applied to UV Dosimetryneriene alves0wilmar barbosa ferraz1Luiz oliveira Faria2Universidade Federal do Estado de Minas Gerais/ Departamento de Engenharia NuclearCentro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN)Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN)In this work we have investigated the thermoluminescent (TL) response of carbon doped lanthanum aluminate crystals grown by solid state reaction method. We conducted three syntheses by different combinations of Al2O3, La2O3 and 0.1 wt % of carbon atoms. The 1:1 mixture of aluminum and lanthanum oxide was mixed with 0.1wt.% carbon and annealed at 1700°C for two hours in a hydrogen atmosphere. The X-ray diffraction analysis revealed the formation of the rhombohedral LaAlO3 crystallographic phase. F and F + centers were identified by ultraviolet-visible spectroscopy. Fourier transform infrared spectroscopic data show higher and lower frequencies assigned to AlO6 octahedra in LaAlO3. The UV irradiations were carried out using a commercial 8W UV lamp. Thermoluminescence measurements were performed at a Harshaw 4500 TL reader. The three syntheses were very efficient to obtain carbon doped LaAlO3 crystals with high thermoluminescent output, for low exposure rates of UVR fields.https://bjrs.org.br/revista/index.php/REVISTA/article/view/602lanthanum aluminatethermoluminescenceultraviolet radiation. |
| spellingShingle | neriene alves wilmar barbosa ferraz Luiz oliveira Faria Thermoluminescent properties of LaAlO3:C crystals synthesized by solid state reaction applied to UV Dosimetry Brazilian Journal of Radiation Sciences lanthanum aluminate thermoluminescence ultraviolet radiation. |
| title | Thermoluminescent properties of LaAlO3:C crystals synthesized by solid state reaction applied to UV Dosimetry |
| title_full | Thermoluminescent properties of LaAlO3:C crystals synthesized by solid state reaction applied to UV Dosimetry |
| title_fullStr | Thermoluminescent properties of LaAlO3:C crystals synthesized by solid state reaction applied to UV Dosimetry |
| title_full_unstemmed | Thermoluminescent properties of LaAlO3:C crystals synthesized by solid state reaction applied to UV Dosimetry |
| title_short | Thermoluminescent properties of LaAlO3:C crystals synthesized by solid state reaction applied to UV Dosimetry |
| title_sort | thermoluminescent properties of laalo3 c crystals synthesized by solid state reaction applied to uv dosimetry |
| topic | lanthanum aluminate thermoluminescence ultraviolet radiation. |
| url | https://bjrs.org.br/revista/index.php/REVISTA/article/view/602 |
| work_keys_str_mv | AT nerienealves thermoluminescentpropertiesoflaalo3ccrystalssynthesizedbysolidstatereactionappliedtouvdosimetry AT wilmarbarbosaferraz thermoluminescentpropertiesoflaalo3ccrystalssynthesizedbysolidstatereactionappliedtouvdosimetry AT luizoliveirafaria thermoluminescentpropertiesoflaalo3ccrystalssynthesizedbysolidstatereactionappliedtouvdosimetry |