Development Of A Real-Time Neutron Detector For Measurement At Whole Body Position In Bnct

Since fast neutrons have high relative biological effectiveness, real-time fast neutron monitor at the whole body is desired in BNCT irradiation. Thermal neutrons can be measured with the LiCAF scintillator, but fast neutrons can not be directly measured. In this study, we optimized polyethylene moderator for the measurement of fast neutrons that can be adapted to the whole body position in BNCT irradiation. The produced polyethylene moderator was combined with a LiCAF scintillator to conduct a characteristic test of fast neutron measurements. It has been confirmed that fast neutrons can be measured in real time at the position of the neck, chest and abdomen of a water phantom that simulates the human body.