Nuclear Engineering and Technology

  • 제52권6호
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  • Pages.1271-1276
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  • 2020
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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New mathematical approach to calculate the geometrical efficiency using different radioactive sources with gamma-ray cylindrical shape detectors

  • Thabet, Abouzeid A. (Department of Medical Equipment Technology, Faculty of Allied Medical Sciences, Pharos University in Alexandria) ;
  • Hamzawy, A. (Physics Department, Al-Jamoum University College, Umm Al-Qura University) ;
  • Badawi, Mohamed S. (Physics Department, Faculty of Science, Beirut Arab University)
  • 투고 : 2019.09.01
  • 심사 : 2019.11.20
  • 발행 : 2020.06.25
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초록

The geometrical efficiency of a source-to-detector configuration is considered to be necessary in the calculation of the full energy peak efficiency, especially for NaI(Tl) and HPGe gamma-ray spectroscopy detectors. The geometrical efficiency depends on the solid angle subtended by the radioactive sources and the detector surfaces. The present work is basically concerned to establish a new mathematical approach for calculating the solid angle and geometrical efficiency, based on conversion of the geometrical solid angle of a non-axial radioactive point source with respect to a circular surface of the detector to a new equivalent geometry. The equivalent geometry consists of an axial radioactive point source with respect to an arbitrary elliptical surface that lies between the radioactive point source and the circular surface of the detector. This expression was extended to include coaxial radioactive circular disk source. The results were compared with a number of published data to explain how significant this work is in the efficiency calibration procedure for the γ-ray detection systems, especially in case of using isotropic radiating γ-ray sources in the form of point and disk shapes.

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참고문헌

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