Study of neutron dose equivalent at the HIRFL deep tumor therapy terminal

The secondary neutron fields at the deep tumor therapy terminal at HIRFL（Heavy Ion Research Facility in Lanzhou） were investigated. The distributions of neutron ambient dose equivalent were measured with a FHT762Wendi-II neutron ambient dose equivalent meter as ~（12）C ions with energies of 165, 207,...

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Bibliographic Details
Published in:Chinese physics C 2017-06, Vol.41 (6), p.167-171
Main Author: 徐俊奎 苏有武 李武元 严维伟 李宗强 毛旺 庞成果 徐翀
Format: Article
Language:English
Subjects:
deep tumor therapy
HIRFL
neutron dose equivalent
radiation protection
中子场
周围剂量当量
实验数据
终端
肿瘤治疗
重离子治疗
重离子研究装置
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Summary:The secondary neutron fields at the deep tumor therapy terminal at HIRFL（Heavy Ion Research Facility in Lanzhou） were investigated. The distributions of neutron ambient dose equivalent were measured with a FHT762Wendi-II neutron ambient dose equivalent meter as ~（12）C ions with energies of 165, 207, 270, and 350 Me V/u were bombarded on thick tissue-like targets. The thickness of targets used in the experiments was larger than the range of the carbon ions. The neutron spectra and dose equivalent were simulated by using FLUKA code, and the results agree well with the experimental data. The experiment results showed that the neutron dose produced by fragmentation reactions in tissue can be neglected in carbon-ion therapy, even considering their enhanced biological effectiveness.These results are also valuable for radiation protection, especially in the shielding design of high energy heavy ion medical machines.
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/41/6/068201