Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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A Design of the Thickness Gauge Using the Compton Gamma-ray Backscattering

  • B.S. Moon (Korea Atomic Energy Research Institute) ;
  • Kim, Y.K. (Korea Atomic Energy Research Institute) ;
  • Kim, J.Y. (Korea Atomic Energy Research Institute) ;
  • Kim, J.T. (Korea Atomic Energy Research Institute) ;
  • C.E. Chung (Korea Atomic Energy Research Institute) ;
  • S.B. Hong (Korea Atomic Energy Research Institute)
  • Published : 2000.10.01
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Abstract

In this paper, we describe the results of various calculations performed for a design of the thickness gauges that use the gamma-ray backscattering method. The radiation source is assumed to be the $_{24}$1Am(60keV gamma-ray) and the detector is a single crystal scintillator in a cylindrical form. The source is located at the center of the detector with the collimator of a cylindrical shape. First, when gamma-rays are incident on a material with a constant angle, we compute the variations of the spectrum for the photons scattered into different angular intervals. Next, we compute for an optimal size for the collimator cylinder for a fixed detector size and an optimal distance from the detector to the material. Finally, we compute the number of observed photons for different thickness of two different materials, a plastic film and an Al foil.

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References

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