| Evaluation of D(d,n)~3He reaction neutron source models for BNCT irradiation system design |
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| 作者姓名： | Tooru KOBAYASHI Gerard BENGUA |
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| 作者单位： | Research Reactor Institute Kyoto University，Osaka 590-0494，Japan，Research Reactor Institute，Kyoto University，Osaka 590-0494，Japan |
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| 摘 要： | A mathematical method was developed to calculate the yield,energy spectrum and angular distribution of neutrons from D(d,n)~3He(D-D)reaction in a thick deuterium-titanium target for incident deuterons in energies lower than 1.0MeV.The data of energy spectrum and angular distribution were applied to set up the neutron source model for the beam-shaping-assembly(BSA)design of Boron-Neutron-Capture-Therapy(BNCT)using MCNP-4C code. Three cases of D-D neutron source corresponding to incident deuteron energy of 1000,400 and 150 key were inves- tigated.The neutron beam characteristics were compared with the model of a 2.45 MeV mono-energetic and isotropic neutron source using an example BSA designed for BNCT irradiation.The results show significant differences in the neutron beam characteristics,particularly the fast neutron component and fast neutron dose in air,between the non-isotropic neutron source model and the 2.5 MeV mono-euergetic and isotropic neutron source model.
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Evaluation of D(d,n)3 He reaction neutron source models for BNCT irradiation system design |
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| Tooru KOBAYASHI,Gerard BENGUA.Evaluation of D(d,n)~3He reaction neutron source models for BNCT irradiation system design[J].Nuclear Science and Techniques,2007,18(6). |
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| Authors: | YAO Ze'en LUO Peng Tooru KOBAYASHI Gerard BENGUA |
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| Abstract: | A mathematical method was developed to calculatc the yield.energy spectrum and angular distribution of neutrons from D(d,n)3 He(D-D)reaction in a thick deuterium-titanium target for incident deuterons in energies lower than 1.0MeV.The data of energy spectrum and angular distribution wefe applied to set up the neutron source model for the beam-shaping-assembly(BSA)design of Boron-Neutron-Capture-Therapy(BNCT)using MCNP-4C code.Three cases of D-D neutron source corresponding to incident deuteron energy of 1000.400 and 150 kaV were investigated.The neutron beam characteristics were compared with the model of a 2.45 MeV mono-energetic and isotropic neutron source using an example BSA designed for BNCT irradiation.The results show significant differences in the neutron beam characteristics,particularly the fast neutron component and fast neutron dose in air,between the non-isotropic neutron source model and the 2.5 MeV mono-energetic and isotropic neutron source model. |
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| Keywords: | D(d n)3 He reaction neutron source Neutron energy spectrum Neutron angular distribution Neutron beam characteristics in air BNCT Evaluation system design irradiation BNCT models neutron source component fast dose results show significant differences isotropic example beam characteristics cases deuteron code |
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