| PHYSICS AND ENGINEERING PHYSICS |
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Dose equivalent of neutron and induced gamma rays near a medical accelerator |
| CHEN Yizheng1, LI Junli1, QIU Rui1, WU Zhen1, KANG Xi2 |
1. Key Laboratory of Particle and Radiation Imaging of Ministry of Education, Department of Engineering Physics, Tsinghua University, Beijing 100084, China;
2. School of Nuclear Science & Technology, University of South China, Hengyang 421001, China |
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Abstract High energy accelerators are widely used in medicine, but the related radiation shielding calculations are difficult, especially for rapid assessments of the radiation dose in a maze. This study describes typical estimating methods for the dose equivalent of neutron and induced gamma rays in a maze, and calculates the dose equivalent in a multiple-bend maze. The results were compared with Monte Carlo simulations using the Monte Carlo N-particle transport code (MCNP). The methods can accurately estimate the dose equivalent of the neutron and induced gamma rays in the maze, within an order of magnitude of the Monte Carlo simulation results, with underestimates in some cases. Therefore, a safety factor is suggested for practical applications.
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| Keywords
dose equivalent
maze
neutron
induced gamma ray
Monte Carlo simulation
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Issue Date: 15 December 2016
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2016,
Vol. 56
