Investigating a proton beam-based neutron source for BNCT using the MCNP simulation

Works in this project are focused on the design and optimization of a beam shaping assembly (BSA) for boron neutron capture therapy (BNCT) based on a 30 MeV proton beam generator. The aim was to maximize the epithermal neutron flux and to prevent the background radiation which are required for the B...

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Bibliographic Details
Published in:Journal of physics. Conference series 2018-12, Vol.1144 (1), p.12004
Main Authors: Leelanoi, P, Buranurak, S, Sangaroon, S
Format: Article
Language:English
Subjects:
Aluminum oxide
Background radiation
Beryllium
Collimators
Converters
Design optimization
Fast neutrons
Lithium
Neutron flux
Neutrons
Nuclear capture
Polyethylenes
Proton beams
Uranium
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Summary:Works in this project are focused on the design and optimization of a beam shaping assembly (BSA) for boron neutron capture therapy (BNCT) based on a 30 MeV proton beam generator. The aim was to maximize the epithermal neutron flux and to prevent the background radiation which are required for the BNCT designation. A set of material and geometry simulations of neutron multiplier, moderator, reflector, and collimator was examined. The final configuration consists of 0.5 cm of beryllium as a p-n converter, 15 cm in radius of uranium as a neutron multiplier, 44 cm of TiF3 and 15 cm of Al2O3 as a first and second layer of moderator, 10 cm thickness of lead as a reflector, and lithium polyethylene as a collimator. According to the results of the calculation, the proposed cylinder BSA provides high epithermal neutron flux at the irradiation area.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1144/1/012004