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Measurement of 107-MeV proton-induced double-differential thick target neutron yields for Fe, Pb, and Bi using a fixed-field alternating gradient accelerator at Kyoto University

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posted on 22.09.2022, 13:40 authored by Hiroki Iwamoto, Keita Nakano, Shin-Ichiro Meigo, Daiki Satoh, Yosuke Iwamoto, Kenta Sugihara, Katsuhisa Nishio, Yoshihiro Ishi, Tomonori Uesugi, Yasutoshi Kuriyama, Hiroshi Yashima, Kota Okabe, Hiroyuki Makii, Kentaro Hirose, Riccardo Orlandi, Fumi Suzaki, Akito Oizumi, Kazuaki Tsukada, Fujio Maekawa, Yoshiharu Mori

Double-differential thick target neutron yields (TTNYs) for Fe, Pb, and Bi targets induced by 107-MeV protons were measured using the fixed-field alternating gradient accelerator at Kyoto University for the research and development of accelerator-driven systems (ADSs) and fundamental ADS reactor physics research at the Kyoto University Critical Assembly (KUCA). Note that TTNYs were obtained with the time-of-flight method using a neutron detector system comprising eight neutron detectors; each detector has a small EJ-301 liquid organic scintillator and photomultiplier tube. The TTNYs obtained were compared with calculation results using Monte Carlo-based spallation models (i.e. INCL4.6/GEM, Bertini/GEM, JQMD/GEM, and JQMD/SMM/GEM) and the evaluated high-energy nuclear data library, i.e. JENDL-4.0/HE, implemented in the particle and heavy ion transport code system (PHITS). All models, including JENDL-4.0/HE, failed to predict high-energy peaks at a detector angle of 5. Comparing the energy- and angle-integrated spallation neutron yields at energies of ≤20 MeV estimated using the measured TTNYs and the PHITS indicated that INCL4.6/GEM would be suitable for the Monte Carlo transport simulation of ADS reactor physics experiments at the KUCA.