An Experimental program of nuclear data for development of accelerator-driven systems

Iwamoto, Hiroki   ; Meigo, Shinichiro   ; Nishio, Katsuhisa   ; Ishi, Yoshihiro*; Hirose, Kentaro  ; Iwamoto, Yosuke   ; Kuriyama, Yasutoshi*; Makii, Hiroyuki   ; Maekawa, Fujio  ; Mori, Yoshiharu*; Okabe, Kota  ; Oizumi, Akito   ; Orlandi, R.  ; Satoh, Daiki   ; Sugihara, Kenta*; Suzaki, Fumi  ; Tsukada, Kazuaki  ; Uesugi, Tomonori*; Yashima, Hiroshi*

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 Np by spallation neutrons, Pb(p,f) reaction and Bi(p,f) reactions, the mass number distribution of fission fragments produced in the Pb(p,f) and Bi(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.