TL and OSL analyses of natural orange calcite crystal
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Sociedade Brasileira de Proteção Radiológica - SBPR
2022
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| _version_ | 1876456951563419648 |
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| author | A.L.P.C. Almeida |
| author_facet | A.L.P.C. Almeida |
| contents | TL and OSL analyses of natural orange calcite crystal A.L.P.C. Almeida H. S. Tatumi F. A Soares de F. R. Barbosa Biología Orange calcite Thermoluminescence Optically Stimulated Luminescence The study presents Thermoluminescence (TL) and Optically Stimulated Luminescence (OSL) characterization of orange calcite. It is known that calcite exhibits TL, however its OSL emission is still unwell studied. The crystalline characterization was done by means of X-rays Diffraction (XRD) technique, and it was confirmed that the sample is a pure calcium carbonate arranged in a rhombohedral crystal system. Total and traces elements were determined using Total Reflection X-Ray Fluorescence (TXRF) technique. Several impurities were found, such as Fe (117 mg/kg), Sr (80 mg/kg), K (79 mg/kg), Mn (34 mg/kg). Furthermore, some trace impurities, such as Ni (3.87 mg/kg), Pb (3.8 mg/kg), Cr (2.1 mg/kg), Zn (1.54 mg/kg) and Hf (1 mg/kg) were also determined, and they may play an important role in the luminescent emission of orange calcite. Samples in powder form were irradiated with crescent doses of beta particles, in the dose range of 0.16-20 Gy. Applying the deconvolution technique of the TL emission curve in Ultraviolet (UV) region, through the general order kinetics model, individuals TL peaks were found at 93, 130, 162, 189 and 227 °C. An OSL response was verified and can be fitted using 3 components with decay constant values of 2.3, 10.0 and 77.4 s. It can conclude that orange calcite exhibits UV luminescence in both TL and OSL emissions, with high sensitivity compared to those found in the literature. Thus, it can be used in dating and dosimetry for doses from 0.3 Gy for TL and 4 Gy for the OSL technique. 2022 artículo científico 2319-0612 https://www.redalyc.org/articulo.oa?id=722280973005 en http://www.redalyc.org/revista.oa?id=7222 Brazilian Journal of Radiation Sciences application/pdf Sociedade Brasileira de Proteção Radiológica - SBPR Brazilian Journal of Radiation Sciences (Brasil) Num.2A Vol.10 |
| format | Artículo científico |
| id | redalyc_722280973005 |
| institution | Redalyc |
| language | en |
| publishDate | 2022 |
| publisher | Sociedade Brasileira de Proteção Radiológica - SBPR |
| spellingShingle | TL and OSL analyses of natural orange calcite crystal A.L.P.C. Almeida Biología Orange calcite Thermoluminescence Optically Stimulated Luminescence TL and OSL analyses of natural orange calcite crystal A.L.P.C. Almeida H. S. Tatumi F. A Soares de F. R. Barbosa Biología Orange calcite Thermoluminescence Optically Stimulated Luminescence The study presents Thermoluminescence (TL) and Optically Stimulated Luminescence (OSL) characterization of orange calcite. It is known that calcite exhibits TL, however its OSL emission is still unwell studied. The crystalline characterization was done by means of X-rays Diffraction (XRD) technique, and it was confirmed that the sample is a pure calcium carbonate arranged in a rhombohedral crystal system. Total and traces elements were determined using Total Reflection X-Ray Fluorescence (TXRF) technique. Several impurities were found, such as Fe (117 mg/kg), Sr (80 mg/kg), K (79 mg/kg), Mn (34 mg/kg). Furthermore, some trace impurities, such as Ni (3.87 mg/kg), Pb (3.8 mg/kg), Cr (2.1 mg/kg), Zn (1.54 mg/kg) and Hf (1 mg/kg) were also determined, and they may play an important role in the luminescent emission of orange calcite. Samples in powder form were irradiated with crescent doses of beta particles, in the dose range of 0.16-20 Gy. Applying the deconvolution technique of the TL emission curve in Ultraviolet (UV) region, through the general order kinetics model, individuals TL peaks were found at 93, 130, 162, 189 and 227 °C. An OSL response was verified and can be fitted using 3 components with decay constant values of 2.3, 10.0 and 77.4 s. It can conclude that orange calcite exhibits UV luminescence in both TL and OSL emissions, with high sensitivity compared to those found in the literature. Thus, it can be used in dating and dosimetry for doses from 0.3 Gy for TL and 4 Gy for the OSL technique. 2022 artículo científico 2319-0612 https://www.redalyc.org/articulo.oa?id=722280973005 en http://www.redalyc.org/revista.oa?id=7222 Brazilian Journal of Radiation Sciences application/pdf Sociedade Brasileira de Proteção Radiológica - SBPR Brazilian Journal of Radiation Sciences (Brasil) Num.2A Vol.10 |
| title | TL and OSL analyses of natural orange calcite crystal |
| topic | Biología Orange calcite Thermoluminescence Optically Stimulated Luminescence |
| url | https://www.redalyc.org/articulo.oa?id=722280973005 |