کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8251523 | 1533479 | 2018 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
BaSO4:Eu as an energy independent thermoluminescent radiation dosimeter for gamma rays and C6+ ion beam
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
تشعشع
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: BaSO4:Eu as an energy independent thermoluminescent radiation dosimeter for gamma rays and C6+ ion beam BaSO4:Eu as an energy independent thermoluminescent radiation dosimeter for gamma rays and C6+ ion beam](/preview/png/8251523.png)
چکیده انگلیسی
BaSO4:Eu nanophosphor is delicately optimized by varying the concentration of the impurity element and compared to the commercially available thermoluminescent dosimeter (TLD) LiF:Mg,Ti (TLD-100) and by extension also to CaSO4:Dy (TLD-900) so as to achieve its maximum thermoluminescence (TL) sensitivity. Further, the energy dependence property of this barite nanophosphor is also explored at length by exposing the phosphor with 1.25Â MeV of Co-60, 0.662Â MeV of Cs-137, 85Â MeV and 65Â MeV of Carbon ion beams. Various batches of the phosphor at hand (with impurity concentrations being 0.05, 0.10, 0.20, 0.50 and 1.00Â mol%) are prepared by the chemical co-precipitation method out of which BaSO4:Eu with 0.20Â mol% Eu exhibits the maximum TL sensitivity. Further, the optimized nanophosphor exhibits a whopping 28.52 times higher TL sensitivity than the commercially available TLD-100 and 1.426 times higher sensitivity than TLD-900, a noteworthy linear response curve for an exceptionally wide range of doses i.e. 10Â Gy to 2Â kGy and a simple glow curve structure. Furthermore, when the newly optimized nanophosphor is exposed with two different energies of gamma radiations, namely 1.25Â MeV of Co-60 (dose range- 10-300Â Gy) and 0.662Â MeV of Cs-137 (dose range- 1-300Â Gy), it is observed that the shape and structure of the glow curves remain remarkably similar for different energies of radiation while the TL response curve shows little to no variation. When exposed to different energies of carbon ion beam BaSO4:Eu displays energy independence at lower doses i.e. from 6.059 to 14.497Â kGy. Finally, even though energy independence is lost at higher doses, the material shows high sensitivity to higher energy (85Â MeV) of carbon beam compared to the lower energy (65Â MeV of C6+) and saturation is apparent only after 121.199Â kGy. Therefore the present nanophosphor displays potential as an energy independent TLD.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Physics and Chemistry - Volume 145, April 2018, Pages 64-73
Journal: Radiation Physics and Chemistry - Volume 145, April 2018, Pages 64-73
نویسندگان
Kanika Sharma, Shaila Bahl, Birendra Singh, Pratik Kumar, S.P. Lochab, Anant Pandey,