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http://dx.doi.org/10.7742/jksr.2018.12.2.179

A Study on the Performance Evaluation of Standard Gamma Irradiation System Using Monte Carlo Code  

Park, Won-Seok (The 85 Precision Standard Maintenance Depot, Air Force)
Heo, Seung-Uk (Department of Biomedical Engineering, Inje University)
Kim, Jang-Oh (Department of Emergency Management, Inje University)
Min, Byung-In (Department of Nuclear Applied Engineering, Inje University)
Publication Information
Journal of the Korean Society of Radiology / v.12, no.2, 2018 , pp. 179-184 More about this Journal
Abstract
In this study, we compared the measured values of the effective beam size of standard gamma irradiator with the simulation results to provide a useful means to the effective beam area determination. Results of the simulation and measured using ion chamber was distributed in a relative error of 4.5 ~ 7.3% of the case of air kerma rate. The size of the effective beam area is when the simulation was implemented in the horizontal direction 27cm, 21.6cm vertical direction, the measured result using a film was obtained similar results with the horizontal direction 26.5cm, 21.9cm vertical direction. The relative error in the horizontal direction is 1.85% and 1.38% vertical effective beam area was also similarly distributed around the field gamma rays. As a result of the study, it was confirmed that the effectiveness of the simulation was sufficient for the gamma irradiation system. In particular, it is small relative errors in the effective beam size than the air kerma rate is considered to be due to the size of the beam is determined by geometric factors rather than the capacity of the standard source. A further study is needed to improve the reliability of the photon energy distribution diagram using simulation.
Keywords
Monte Carlo simulation; FLUKA; Gamma Irradiator; Effective radiation area;
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