کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8208544 | 1532058 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Exfoliated graphite with graphene flakes as potential candidates for TL dosimeters at high gamma doses
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
تشعشع
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Graphite powder (GP) subjected to microwave radiation (MWG) results in exfoliation of graphite particles into few-layered graphene flakes (GF) intermixed with partially exfoliated graphite particles (PEG). Characterization of MWG by Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) and Raman spectroscopy reveal few-layer GF with sizes ranging from 0.2 to 5â¯Âµm. Raman D, G, and 2D (Gâ²) bands characteristic of graphitic structures include evidence of the presence of bilayered graphene. The thermoluminescent (TL) dosimetric properties of MWG are evaluated and can be characterized as a gamma-ray sensitive and dose-resistant material with kinetic parameters (activation energy for the main peak located at 400 and 408â¯K is 0.69 and 0.72â¯eV) and threshold dose (~1â¯kGy and 5â¯kGy respectively). MWG is a low-Z material (Zeff = 6) with a wide linear range of TL dose-response (0.170-2.5â¯kGy) tested at doses in the 1-20â¯kGy range with promising results for applications in gamma-ray dosimetry. Results obtained in gamma irradiated MWG are compared with those obtained in graphite powder samples (GP) without microwave treatment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Radiation and Isotopes - Volume 139, September 2018, Pages 310-315
Journal: Applied Radiation and Isotopes - Volume 139, September 2018, Pages 310-315
نویسندگان
A. Ortiz-Morales, E. López-González, G. Rueda-Morales, G. Ortega-Cervantez, J. Ortiz-Lopez,