[7a-N103-1~10] 2.4 Life Sciences, Medical applications, Space and Earth Environment, Radiation Education

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[7a-N103-10] Proposal of a Novel Detection Configuration Using BeO Ceramic Plate and HDPE for Fast Neutron Discrimination in BNCT

〇(M2)Leo Takahashi¹, Hiroki Tanaka², Shinnosuke Matsumoto¹, Genichiro Wakabayashi³, Kiyomitsu Shinsho¹ (1.Tokyo Metropolitan Univ., 2.Kyoto Univ., 3.Kindai Univ.)

Keywords:

Fast neutron,BNCT,Monte Carlo simulations

Conventional fast neutron measurement methods using High-Density Polyethylene (HDPE) converters have been widely known. However, in BNCT irradiation fields with a broad neutron energy spectrum, and gamma-rays generated from (n, γ) reactions between thermal neutrons and hydrogen in the converter become significant noise, making neutron discrimination difficult. In this study, we propose a new configuration in which BeO ceramic plates are placed on both sides of an HDPE converter. PHITS simulations suggest that subtracting the signals from the front and rear enables effective gamma-ray removal and selective detection of fast neutrons under BNCT irradiation conditions.