کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1738914 1016822 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of Monte Carlo-based calibrations of HPGe detectors for in situ gamma-ray spectrometry
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
پیش نمایش صفحه اول مقاله
Evaluation of Monte Carlo-based calibrations of HPGe detectors for in situ gamma-ray spectrometry
چکیده انگلیسی

The aim of this work was to evaluate the use of Monte Carlo-based calibrations for in situ gamma-ray spectrometry. We have performed in situ measurements at five different sites in Sweden using HPGe detectors to determine ground deposition activity levels of 137Cs from the 1986 Chernobyl accident. Monte Carlo-calculated efficiency calibration factors were compared with corresponding values calculated using a more traditional semi-empirical method. In addition, results for the activity ground deposition were also compared with activity densities found in soil samples. In order to facilitate meaningful comparisons between the different types of results, the combined standard uncertainty of in situ measurements was assessed for both calibration methods. Good agreement, both between the two calibration methods, and between in situ measurements and soil samples, was found at all five sites. Uncertainties in in situ measurements for the given measurement conditions, about 20 years after the fallout occurred, were found to be in the range 15–20% (with a coverage factor k = 1, i.e. with a confidence interval of about 68%).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Radioactivity - Volume 100, Issue 11, November 2009, Pages 935–940
نویسندگان
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