Radiation Physics and Engineering
A peer-reviewed journal published by K. N. Toosi University of Technology

Calculation of dose uniformity ratio in irradiation cell of GC-220 using analytical method based on multipole moment expansion‎

Document Type : Research Article

Authors

‎P‎eiman ‎Rezaeian 1
‎V‎ahideh ‎Ataenia 1
‎S‎epideh ‎Shafiei 2

1 Radiation Applications Research School‎, ‎Nuclear Science and Technology Research Institute‎, ‎AEOI‎, ‎PO Box 11365-3486‎, ‎Tehran‎, ‎Iran

2 Physics and Accelerators Research School‎, ‎Nuclear Science and Technology Research Institute‎, ‎AEOI‎, ‎PO Box 11365-3486‎, ‎Tehran‎, ‎Iran‎

https://doi.org/10.22034/rpe.2020.57886
Abstract
‎In this paper‎, ‎dose uniformity ratio in irradiation cell of GC-220 is specifiedutilizing an analytical method based on the multipole moment expansion‎. ‎In this method‎, ‎the values of monople‎, ‎dipole and quadrupole moments for source arrangements of GC-220 are calculated by numerical integrating‎. ‎Appling these values‎, ‎the dose uniformity ratio in the irradiation cell of GC-220 is calculated equal to 1.92‎. ‎Monte Carlo simulation is applied to validate calculations‎. ‎There is a relative difference about 12% between the results obtained from the analytical calculation and Monte Carlo simulation‎, ‎which confirm the used method‎. ‎In comparison with Monte Carlo methods‎, ‎this method is not time consuming‎, ‎so‎, ‎this method can be used for the conceptual designing and the source load planning of irradiators‎.

Highlights

  • The dose uniformity ratio DUR is calculated using the analytical method.
  • The analytical method was based on multipole moment expansion.
  • The DUR in radiation cell of GC-220 was calculated using Monte Carlo simulations.
  • The di erence between values of DUR calculated by the analytical and simulation is less than 12%.
  • The consistency between calculations and Monte Carlo simulations validates the presented method.

Keywords

‎Dose Uniformity Ratio
‎Mutipole Moment Expansion
‎Monte Carlo Method
‎Gamma Cell 220
‎Source Load Planning‎
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Radiation Physics and Engineering
Volume 1, Issue 1
Winter 2020
Pages 29-32

  • Receive Date 26 September 2017
  • Revise Date 29 October 2017
  • Accept Date 31 December 2017

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