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

Jun-Kui Xu; You-Wu Su; Wu-Yuan Li; Wei-Wei Yan; Zong-Qiang Li; Wang Mao; Cheng-Guo Pang; Chong Xu

doi:10.1088/1674-1137/41/6/068201

Chinese Physics C> 2017, Vol. 41> Issue(6) : 068201 DOI: 10.1088/1674-1137/41/6/068201

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

Jun-Kui Xu ^1,2,, ,
You-Wu Su ^1,, ,
Wu-Yuan Li ¹ ,
Wei-Wei Yan ¹ ,
Zong-Qiang Li ¹ ,
Wang Mao ¹ ,
Cheng-Guo Pang ² ,
Chong Xu ¹

1.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2.
School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
3.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
4.
School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China

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Abstract：
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 FHT762 Wendi-II neutron ambient dose equivalent meter as ¹²C ions with energies of 165, 207, 270, and 350 MeV/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.
- deep tumor therapy ,
- neutron dose equivalent ,
- radiation protection

References

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Jun-Kui Xu, You-Wu Su, Wu-Yuan Li, Wei-Wei Yan, Zong-Qiang Li, Wang Mao, Cheng-Guo Pang and Chong Xu. Study of neutron dose equivalent at the HIRFL deep tumor therapy terminal[J]. Chinese Physics C, 2017, 41(6): 068201. doi: 10.1088/1674-1137/41/6/068201

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Received: 2016-07-12
Revised: 2016-12-04

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: Jun-Kui Xu,

Corresponding author: You-Wu Su,

1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

2. School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China

3. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

4. School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China

Received Date: 2016-07-12

Accepted Date: 2016-12-04

Available Online: 2017-06-05

Abstract: 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 FHT762 Wendi-II neutron ambient dose equivalent meter as ¹²C ions with energies of 165, 207, 270, and 350 MeV/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.

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

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