WEN Weiwei LI Hang WANG Sheng ZOU Yubin ZHU Kun LU Yuanrong TANG Guoyou GUO Zhiyu. Neutron moderation and collimation of a D-Be neutron source based on a high current accelerator[J]. Nuclear techniques, 2010, 33(5): 362-366.
WEN Weiwei LI Hang WANG Sheng ZOU Yubin ZHU Kun LU Yuanrong TANG Guoyou GUO Zhiyu. Neutron moderation and collimation of a D-Be neutron source based on a high current accelerator[J]. Nuclear techniques, 2010, 33(5): 362-366.DOI:
Thermalization and transport of the neutrons generated from D-Be reaction were simulated using MCNP code.The source neutron energy spectrum
angular distribution and beam spot size were considered in the simulation
which shows that using a polyethylene cylinder of Φ28 cm × 28 cm as moderator and reflector can provide higher thermal neutron flux.The thermal neutron distribution changes negligibly with the radius of deuteron beam spot on the Be target when the radius is less than 1 cm.Increasing the angle between axis of collimator and axis of D+ beam tube can reduce greatly the fast neutron numbers and the γ components of imaging beam.