Designing of the 14 MeV neutron moderator for BNCT

In boron neutron capture therapy （BNCT）, the ratio of the fast neutron flux to the neutron flux in the tumor （RFNT） must be less than 3% If a D-T neutron generator is used in BNCT, the 14 MeV neutron moderator must be optimized to reduce the RFNT. Based on the neutron moderation theory and the simul...

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Bibliographic Details
Published inChinese physics C Vol. 36; no. 9; pp. 905 - 908
Main Author 程道文 陆景彬 杨东 刘玉敏 王辉东 马克岩
Format Journal Article
LanguageEnglish
Published 01.09.2012
Subjects
Capture (nuclear)
Diamonds
Fast neutrons
MeV
Moderators
Neutron flux
Simulation
Tumors
Tungsten
中子俘获
中子发生器
仿真结果
快中子通量
慢化剂
设计
金刚石层
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ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/36/9/020

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Summary:In boron neutron capture therapy （BNCT）, the ratio of the fast neutron flux to the neutron flux in the tumor （RFNT） must be less than 3% If a D-T neutron generator is used in BNCT, the 14 MeV neutron moderator must be optimized to reduce the RFNT. Based on the neutron moderation theory and the simulation results, tungsten, lead and diamond were used to moderate the 14 MeV neutrons. Satisfying RFNT of less than 3%, the maximum neutron flux in the tumor was achieved with a three-layer moderator comprised of a 3 cm thick tungsten layer, a 14 cm thick lead layer and a 21 cm thick diamond layer.
Bibliography:BNCT, D-T neutron generator, three-layer moderator, RFNT
CHENG Dao-Wen LU Jing-Bin YANG Dong LIU Yu-Min WANG Hui-Dong MA Ke-Yan（ 1 School of Basic Sciences, Changchun University of Technology, Changchun 130012, China 2 College of Physics, Jilin University, Changchun 130021, China）
11-5641/O4
In boron neutron capture therapy （BNCT）, the ratio of the fast neutron flux to the neutron flux in the tumor （RFNT） must be less than 3% If a D-T neutron generator is used in BNCT, the 14 MeV neutron moderator must be optimized to reduce the RFNT. Based on the neutron moderation theory and the simulation results, tungsten, lead and diamond were used to moderate the 14 MeV neutrons. Satisfying RFNT of less than 3%, the maximum neutron flux in the tumor was achieved with a three-layer moderator comprised of a 3 cm thick tungsten layer, a 14 cm thick lead layer and a 21 cm thick diamond layer.
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ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/36/9/020