کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1826723 1027392 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analytical approach to calculate the efficiency of 4π NaI(Tl) gamma-ray detectors for extended sources
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
پیش نمایش صفحه اول مقاله
Analytical approach to calculate the efficiency of 4π NaI(Tl) gamma-ray detectors for extended sources
چکیده انگلیسی

The 4π NaI(Tl) detectors are usually utilized for low-level radioactivity measurements of environmental samples in gamma-ray spectroscopy due to the near 4π solid angle and high full-energy peak and total efficiencies. An analytical theoretical approach is presented here and used to calibrate a 4π NaI(Tl) (2a×2b×2c) detector, with a central rectangle hole (2l×2m×2c) was left empty for sample access, for isotropic radiating (point, plane and volumetric) sources. The approach depends on the accurate calculation of two important factors; the path length d, the photon traverses within the active volume of a gamma detector, and the geometrical solid angle Ω, subtended by the source to the detector at the point of entrance. The comparisons with the experimental and Monte Carlo method works reported in the literature indicate that the present approach is useful in the efficiency calibration of such complicated gamma-ray spectrometer.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 615, Issue 1, 21 March 2010, Pages 48–52
نویسندگان
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