Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11032029 | Applied Radiation and Isotopes | 2018 | 7 Pages |
Abstract
New materials have been widely investigated for ionizing radiation dosimetry for medical procedures. Carbon-doped alumina (α-Al2O3:C) have been reported to be excellent thermoluminescent (TL) and optically stimulated luminescence (OSL) radiation dosimeters. In the present study, we have synthetized nano and micro-sized α-Al2O3:C polycrystals, doped with different percentages of carbon atoms aiming to compare their efficiency as TL dosimeters. The dosimetric characteristics for X ray and gamma fields were investigated. Samples doped with different amounts of carbon atoms were sintered under different atmosphere conditions, at temperatures ranging from 1300â¯Â°C to 1750â¯Â°C. Among the investigated samples, the micro-sized alumina doped with 0.01% of carbon and sintered at 1700â¯Â°C under reducing atmosphere, has presented a very high TL output. The main TL peak is centered at 250â¯Â°C and has a linear behavior with photon dose in the dose range of 0.02-to-5000â¯mGy, with correlation coefficient very close to one (0.99991). Samples produced by using nanosized alumina have shown much lower TL output when compared to the samples with microsized alumina. The micro-sized alumina obtained by the methodology used in this work is a suitable candidate to be explored for application in X and Gamma radiation dosimetry.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
CrÃssia Carem Paiva Fontainha, Neriene Alves, Wilmar Barbosa Ferraz, Luiz Oliveira de Faria,