[2N10-14] Charged Particle Reaction

[2N10] Experimental program of nuclear data for development of accelerator-driven systems

*Hiroki Iwamoto Iwamoto¹, Shin-ichiro Meigo¹, Katsuhisa Nishio¹, Yoshihiro Ishi², Kentaro Hirose¹, Yosuke Iwamoto¹, Yasutoshi Kuriyama², Fujio Maekawa¹, Hiroyuki Makii¹, Yoshiharu Mori² (1. JAEA, 2. Kyoto Univ.)

Keywords:Accelerator driven system, Nuclear data measurement, Spallation reaction, High-energy fission reaction

An experimental program for the research and development of Accelerator-Driven System (ADS) was carried out from FY2019 to FY2022. In this program, nuclear data on 100 MeV proton-induced spallation reactions on ADS target materials were experimentally obtained using the FFAG accelerator at Institute for Integrated Radiation and Nuclear Science, Kyoto University. Specifically, the proton-induced double-differential thick target neutron yield (TTNY) for Fe, Pb, and Bi, neutron-production double-differential cross sections (DDX) for Pb and Bi, fission rate of ²³⁷Np by spallation neutrons, ²⁰⁸Pb(p,f) reaction and ²⁰⁹Bi(p,f) reactions, the mass number distribution of fission fragments produced in the ²⁰⁸Pb(p,f) and ²⁰⁹Bi(p,f) reactions, and the fission neutrons. As a result of comparing the measured data with the analytical values obtained by various nuclear reaction models, issues to be addressed toward the advancement of nuclear reaction models for proton-induced spallation reactions in the 100 MeV region were clarified.