Evaluation of a Neutron Beam Generation Facility for the Accelerator-Based BNCT

The important things in designing facilities for BNCT are to obtain neutron beams with appropriate energy spectrum and intensity for efficient treatment. In recent years, at several universities, accelerator-based BNCT facilities were designed, which are composed of target and beam shaping assembly to generate epithermal neutron beams[1]. As a previous study, target system[2][3] and a beam shaping assembly design[4] with good neutron beam quality and high intensity for BNCT have been researched in Hanyang University. Neutrons are generated from the lithium target through 7 Li(p,n) 7 Be reaction, and moderated to suitable energy spectrum for BNCT. In this study, to evaluate the beam shaping assembly which has been manufactured, neutron spectrum from the lithium target system and beam shaping assembly was measured with He-3 counter, and the results are compared with those from MCNPX.