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Pb and 
Bi in proton-induced reactions near 100 MeVIwamoto, Hiroki; Meigo, Shinichiro; Satoh, Daiki; Iwamoto, Yosuke; Ishi, Yoshihiro*; Uesugi, Tomonori*; Yashima, Hiroshi*; Nishio, Katsuhisa; Sugihara, Kenta*; 
elik, Y.*; et al.
Nuclear Instruments and Methods in Physics Research B, 544, p.165107_1 - 165107_15, 2023/11
Times Cited Count：0 Percentile：0.02(Instruments & Instrumentation)The lack of double-differential cross-section (DDX) data for neutron production below the incident proton energy of 200 MeV hinders the validation of spallation models in technical applications, such as research and development of accelerator-driven systems (ADSs). The present study aims to obtain experimental DDX data for ADS spallation target materials in this energy region and identify issues related to the spallation models by comparing them with the analytical predictions. The DDXs for the (
) reactions of Pb and Bi in the 100-MeV region were measured over an angular range of 30
to 150 using the time-of-flight method. The measurements were conducted at Kyoto University utilizing the FFAG accelerator. The DDXs obtained were compared with calculation results from Monte Carlo-based spallation models and the evaluated nuclear data library, JENDL-5. Comparison between the measured DDX and analytical values based on the spallation models and evaluated nuclear data library indicated that, in general, the CEM03.03 model demonstrated the closest match to the experimental values. Additionally, the comparison highlighted several issues that need to be addressed in order to improve the reproducibility of the proton-induced neutron-production DDX in the 100 MeV region by these spallation models and evaluated nuclear data library.
Chen, Y. H.*; Tassan-Got, L.*; Harada, Hideo; Kimura, Atsushi; n_TOF Collaboration*; 130 of others*
EPJ Web of Conferences, 146, p.03020_1 - 03020_4, 2017/09
Times Cited Count：1 Percentile：61.03(Nuclear Science & Technology)The experimental area 2 (EAR-2) at CERNs neutron time-of-flight facility (n_TOF), which is operational since 2014, is designed and built as a short-distance complement to the experimental area 1 (EAR-1). The Parallel Plate Avalanche Counter (PPAC) monitor experiment was performed to characterize the beam profile and the shape of the neutron flux at EAR-2. The prompt 
-flash which is used for calibrating the time-of-flight at EAR-1 is not seen by PPAC at EAR-2, shedding light on the physical origin of this -flash.
Kimura, Atsushi; Harada, Hideo; Nakamura, Shoji; Toh, Yosuke; Igashira, Masayuki*; Katabuchi, Tatsuya*; Mizumoto, Motoharu*; Hori, Junichi*; Kino, Koichi*
no journal, ,
-ray spectroscopy at J-PARC ANNRI and its perspectiveToh, Yosuke; Kimura, Atsushi; Nakamura, Shoji; Harada, Hideo
no journal, ,
no abstracts in English
Endo, Shunsuke; Kimura, Atsushi; Nakamura, Shoji; Iwamoto, Osamu; Iwamoto, Nobuyuki; Toh, Yosuke; Segawa, Mariko; Maeda, Makoto; Tsuneyama, Masayuki*
no journal, ,
no abstracts in English
Iwamoto, Hiroki; Meigo, Shinichiro; Nishio, Katsuhisa; Ishi, Yoshihiro*; Hirose, Kentaro; Iwamoto, Yosuke; Kuriyama, Yasutoshi*; Maekawa, Fujio; Makii, Hiroyuki; Nakano, Keita; et al.
no journal, ,
no abstracts in English
Kimura, Atsushi
no journal, ,
no abstracts in English
Iwamoto, Hiroki; Meigo, Shinichiro; Nishio, Katsuhisa; Ishi, Yoshihiro*; Hirose, Kentaro; Iwamoto, Yosuke; Kuriyama, Yasutoshi*; Makii, Hiroyuki; Maekawa, Fujio; Mori, Yoshiharu*; et al.
no journal, ,
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.
C(d,n)
N nuclear reactionRossi, A.*; Katabuchi, Tatsuya*; Ishizuka, Chikako*; Nakayama, Shinsuke
no journal, ,
Among currently available neutron sources, the 0.5 MeV - 1.5 MeV energy range is very rare, though neutron cross section in the energy range is necessary for many applications such as the design of the Molten Chloride Salt Fast Reactor. Under these circumstances, this work investigated the development of a neutron source with energies between 0.5 MeV and 1.5 MeV exploiting the C(d,n)N nuclear reaction. The deuteron beam was assumed to be provided by the Pelletron accelerator at the Tokyo Institute of Technology. The neutron fluxes obtained from the assumed setup were estimated by the simulations with the MCNP code using JENDL-5 and the deuteron cross section data newly evaluated in the low incident energy region.
