An evaluation on the design of beam shaping assembly based on the D-T reaction for BNCT

International Nuclear Science and Technology Conference 2014

Asnal, M.^1 ; Liamsuwan, T.^2 ; Onjun, T.^1

School of Manufacturing Systems and Mechanical Engineering, Sirindhom International Institute of Technology, Thammasat University, Pathum Thani, Thailand^1

Nuclear Research and Development Division, Thailand Institute of Nuclear Technology, Ongkharak, Nakhon Nayok, Thailand^2

关键词: Beam shaping assemblies;    Boron neutron capture therapy;    Compact neutron generators;    Epithermal energies;    Fast neutrons;    International atomic energy agency;    Neutron energy;    Thermal neutrons;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/611/1/012031/pdf
DOI  :  10.1088/1742-6596/611/1/012031

来源: IOP

【 摘 要 】

Boron Neutron Capture Therapy (BNCT) can be achieved by using a compact neutron generator such as a compact D-T neutron source, in which neutron energy must be in the epithermal energy range with sufficient flux. For these requirements, a Beam Shaping Assembly (BSA) is needed. In this paper, three BSA designs based on the D-T reaction for BNCT are discussed. It is found that the BSA configuration designed by Rasouli et al. satisfies all of the International Atomic Energy Agency (IAEA) criteria. It consists of 14 cm uranium as multiplier, 23 cm TiF3and 36 cm Fluental as moderator, 4 cm Fe as fast neutron filter, 1 mm Li as thermal neutron filter, 2.6 cm Bi as gamma ray filter, and Pb as collimator and reflector. It is also found that use of specific filters is important for removing the fast and thermal neutrons and gamma contamination. Moreover, an appropriate neutron source plays a key role in providing a proper epithermal flux.