کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8911148 | 1638092 | 2017 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Methodology for determination of correction factors in direct gamma spectrometric measurement of radionuclides in sediments
ترجمه فارسی عنوان
روش شناسی برای تعیین عوامل اصلاح در اندازه گیری مستقیم رادیونوکلئید گاما در رسوبات رسوب
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کلمات کلیدی
فاکتور اصلاح، خود جذب، تداخل طیفی، ترکیب تصادفی واقعی، رسوب، طیف سنج گاما،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
چکیده انگلیسی
In this study, the practical methodologies are described for the determination of the factors for the self-absorption effect (Fs), spectral interferences (Fcsi), and true coincidence summing effects (Fcoi), which are used in direct gamma-spectrometric measurement of radionuclides such as 210Pb, 238U, 234Th, 226Ra, 214Pb, 228Ac, 208Tl, 214Bi, 137Cs and 40K in samples. To validate the applied methods, certified reference materials (CRMs) of lake and stream sediments were measured with an n-type Germanium (Ge) detector-calibrated using a multinuclide reference source. The highest self-absorption correction factors ranged from Fs = 1.44-2.10 for 46.5Â keV peak (210Pb) and Fs = 1.25-1.60 for 63.3Â keV peak (234Th) lying in the low energy region of the spectrum. The systematic influence was observed for 186.2Â keV (226Ra) peak due to spectral interferences with the 235U contribution. For this peak, Fcsi is changed from 0.921 to 0.955. Additionally, the present study suggests that true coincidence summing (TCS) effects are not dominant, except for 208Tl and 214Bi for which Fcoi ranged from 1.179 to 1.192 an ranged from 1.140 to 1.151, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Sediment Research - Volume 32, Issue 3, September 2017, Pages 324-330
Journal: International Journal of Sediment Research - Volume 32, Issue 3, September 2017, Pages 324-330
نویسندگان
Esra Uyar, AlptuÄ Ãzer Yüksel, Rufiyet Güven, Haluk Yücel,