title: Investigation on the reflector/moderator geometry and its effect on the neutron beam design in BNCT.
abstract: In order to provide an appropriate neutron beam for Boron Neutron Capture Therapy (BNCT), a special Beam Shaping Assembly (BSA) must be designed based on the neutron source specifications. A typical BSA includes moderator, reflector, collimator, thermal neutron filter, and gamma filter. In common BSA, the reflector is considered as a layer which covers the sides of the moderator materials. In this paper, new reflector/moderator geometries including multi-layer and hexagonal lattice have been suggested and the effect of them has been investigated by MCNP4C Monte Carlo code. It was found that the proposed configurations have a significant effect to improve the thermal to epithermal neutron flux ratio which is an important neutron beam parameter.
authors: Nuclear Science and Technology Research Institute (NSTRI), Tehran, Iran. Electronic address: Ykasesaz@aeoi.org.ir.
authors: Y
authors: Y
authors: Kasesaz
authors: Department of Physics, K.N.T University, Tehran, Iran.
authors: F
authors: F
authors: Rahmani
authors: Nuclear Science and Technology Research Institute (NSTRI), Tehran, Iran.
authors: H
authors: H
authors: Khalafi
mesh_terms: D016754:Boron Neutron Capture Therapy; D009502:Neutrons
keywords: BNCT; Beam Shaping Assembly; MCNP; Moderator; Reflector