کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11032029 | 1645696 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Very sensitive α-Al2O3:C polycrystals for thermoluminescent dosimetry
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
تشعشع
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چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Radiation and Isotopes - Volume 141, November 2018, Pages 234-240
Journal: Applied Radiation and Isotopes - Volume 141, November 2018, Pages 234-240
نویسندگان
CrÃssia Carem Paiva Fontainha, Neriene Alves, Wilmar Barbosa Ferraz, Luiz Oliveira de Faria,