The penetration, diffusion and energy deposition of high-energy photon
Luo Zheng-Ming (罗正明)a, Gou Cheng-Jun (勾成俊)a, Wolfram Laubb
a Institute of Nuclear Science and Technology, Sichuan University and Key Laboratory for Radiation Physics and Technology of the Education Ministry of China, Chengdu 610064, China; b Radiation Oncology, William Beaumont Hospital, 3601 West 13 Mile Road, Royal Oak, Michigan 48073-6769, USA
Abstract This paper presents a new theory for calculating the transport of high-energy photons and their secondary charged particles. We call this new algorithm characteristic line method, which is completely analytic. Using this new method we cannot only accurately calculate the transport behaviour of energetic photons, but also precisely describes the transport behaviour and energy deposition of secondary electrons, photoelectrons, Compton recoil electrons and positron－electron pairs. Its calculation efficiency is much higher than that of the Monte Carlo method. The theory can be directly applied to layered media situation and obtain a pencil-beam-modelled solution. Therefore, it may be applied to clinical applications for radiation therapy.
Received: 26 December 2002
Revised: 18 March 2003
Accepted manuscript online:
PACS:
05.60.Gg
(Quantum transport)
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10075033) and the International Atomic Energy Agency (Grant No 8064/RB).
Cite this article:
Luo Zheng-Ming (罗正明), Gou Cheng-Jun (勾成俊), Wolfram Laub The penetration, diffusion and energy deposition of high-energy photon 2003 Chinese Physics 12 803
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