Neutron resonance analysis technique in neutron time-of-flight for highly enriched uranium

Rossi, F.  ; Lee, J. ; 吉見 優希*; 弘中 浩太  ; 芝 知宙 ; 寺田 和司*; 堀 順一*

Rossi, F.; Lee, J.; Yoshimi, Yuki*; Hironaka, Kota; Shiba, Tomooki; Terada, Kazushi*; Hori, Junichi*

The ISCN of the JAEA is developing a combined neutron resonance analysis (NRA) system aims to identify and quantify fissile material in an unknown sample. Neutron resonance transmission analysis (NRTA) and neutron resonance capture analysis (NRCA) are used together with the proposed neutron resonance fission neutron analysis (NRFNA). Using a pulsed neutron beam with the neutron time-of-flight (TOF) technique, prompt capture gamma rays and fast fission neutrons from fissile nuclides are measured at the sample location with plastic scintillators able to perform n/g pulse shape discrimination (PSD). In this paper, we report a demonstration experiment for highly enriched uranium samples performed at KURNS-LINAC. This work is supported by MEXT under the subsidy for the "promotion for strengthening nuclear security and the like".