Designing of the 14 MeV neutron moderator for BNCT |
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Authors: | CHENG Dao-Wen, ,LU Jing-Bin,YANG Dong,LIU Yu-Min,WANG Hui-Dong,MA Ke-Yan |
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Affiliation: | 1 School of Basic Sciences,Changchun University of Technology,Changchun 130012,China 2 College of Physics,Jilin University,Changchun 130021,China |
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Abstract: | 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 3cm thick tungsten layer,a 14cm thick lead layer and a 21cm thick diamond layer. |
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Keywords: | BNCT D-T neutron generator three-layer moderator RFNT |
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