Techniques to measure absolute neutron spectrum and intensity for accelerator based neutron source for BNCT

Boron Neutron Capture Therapy (BNCT) is a new and promising cancer therapy. At present, development of accelerator based neutron source (ABNS) is underway to be utilized as a neutron source instead of nuclear reactor. However, it is known that the neutron fields formed with accelerators have different characteristics depending on kind of accelerators. It means we have to characterize the field before practical use. In the authors' group, various neutronics characterization devices have been developed for our BNCT machine named CSePT. It includes source intensity, epi-thermal neutron flux, neutron spectrum and so on. In the present paper, such measuring techniques were overviewed. (author)