LI Changkai, MA Yingjie, TANG Xiaobin, et al. Research of accelerator-based neutron source for boron neutron capture therapy[J]. Nuclear techniques, 2013, 36(9): 090203
LI Changkai, MA Yingjie, TANG Xiaobin, et al. Research of accelerator-based neutron source for boron neutron capture therapy[J]. Nuclear techniques, 2013, 36(9): 090203 DOI: 10.11889/j.0253-3219.2013.hjs.36.090203.
Research of accelerator-based neutron source for boron neutron capture therapy
n) reaction of high neutron yield and low threshold energy has become one of the most important neutron generating reactions for Accelerator-based Boron Neutron Capture Therapy(BNCT).Purpose:Focuses on neutron yield and spectrum characteristics of this kind of neutron generating reaction which serves as an accelerator-based neutron source and moderates the high energy neutron beams to meet BNCT requirements.Methods:The yield and energy spectrum of neutrons generated by accelerator-based7Li(p
n) reaction with incident proton energy from 1.9 MeV to 3.0 MeV are researched using the Monte Carlo code-MCNPX2.5.0.And the energy and angular distribution of differential neutron yield by 2.5-MeV incident proton are also given in this part.In the following part
the character of epithermal neutron beam generated by 2.5-MeV incident protons is moderated by a new-designed moderator.Results:Energy spectra of neutrons generated by accelerator-based7Li(p
n) reaction with incident proton energy from 1.9 MeV to 3.0 MeV are got through the simulation and calculation.The best moderator thickness is got through comparison.Conclusions:Neutron beam produced by accelerator-based7Li(p
n) reaction
with the bombarding beam of 10 mA and the energy of 2.5 MeV
can meet the requirement of BNCT well after being moderated.