Zhang Tao(张涛)a)b), Liu Yi-Bao(刘义保)a)b)†, Yang Bo(杨波)b), Wu He-Xi(吴和喜)b), and Gu Jin-Hu(顾金虎)b)
a Key Laboratory of Nuclear Resources and Environment (East China Institute of Technology), Ministry of Education, Nanchang 330013, China; b School of Nuclear Engineering and Technology, East China Institute of Technology, Fuzhou 344000, China
Abstract In this paper, we simulate the exposure factor by a simple model of a free-air ionization chamber with the Monte Carlo programme Geant4. Special emphasis is placed on the discussion of the exposure factor related to parameters of the chamber model. The reason for the variation in exposure factor with incident ray energy is also analysed in terms of reaction cross section for different types of reactions. The obtained results indicate that our simulation is accurate in the calculation of the exposure factor and can serve as a reference in designing air ionization chambers.
Received: 08 October 2008
Revised: 07 November 2008
Accepted manuscript online:
PACS:
29.40.Cs
(Gas-filled counters: ionization chambers, proportional, and avalanche counters)
Fund: Project supported by
the National Natural Science Foundation of China (Grant No
10647109), the Foundation for Key Program of Ministry of Education,
China (Grant No 208067).
Cite this article:
Zhang Tao(张涛), Liu Yi-Bao(刘义保), Yang Bo(杨波), Wu He-Xi(吴和喜), and Gu Jin-Hu(顾金虎) Monte Carlo simulation of exposure factor 2009 Chin. Phys. B 18 2217
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