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Takahashi, Tone; Mochimaru, Takanori*; Koizumi, Mitsuo; Yoshimi, Yuki*; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*; Ito, Fumiaki*
JAEA-Review 2025-039, 34 Pages, 2025/11
JAEA-Review-2025-039.pdf:2.18MB
To prevent acts of terrorism involving nuclear or radioactive materials at major public events, it is required to have surveillance technologies that either prevent these materials from being brought in or detect quickly if somebody brings them in secretly. Setting radiation gate monitors to survey pedestrians and vehicles is one of the effective methods. However, considering the possibility of individuals bypassing these monitors, complementary technologies are needed to continuously survey areas inside the gates. To survey extensive areas, radiation mapping is effective. By using multiple detectors and aggregating the data, the survey becomes much more efficient. We have developed mobile detectors capable of simultaneously measuring location data and radiation levels outdoors, with the ability to aggregate measurement results via a network and immediately visualize them on a map. For indoor environments, we have developed a technology that integrates radiation measurement results with environmental mapping created using SLAM (Simultaneous Localization and Mapping) to produce 3D maps of the surveyed areas. Additionally, we have been working on the development of a source search technology using a fast neutron detector to quickly detect neutron sources, including nuclear materials. In this report, we describe a concept of the wide area survey system and report technology development results so far.
Takahashi, Tone; Yamaguchi, Ikuto*; Hironaka, Kota*; Mochimaru, Takanori*; Koizumi, Mitsuo; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*
Dai-44-Kai Nihon Kaku Busshitsu Kanri Gakkai Nenji Taikai Kaigi Rombunshu (Internet), 4 Pages, 2023/11
To enhance the counter capability against terrorism in major public events, the Japan Atomic Energy Agency (JAEA) has started developments of monitoring technique that covers wide-area and rapidly detects nuclear and radioactive materials. In this project, we are developing widely applicable radiation mapping device by combining with positioning sensors and a network device. Mapping tests inside and outside of the building by using the device to locate areas with high radiation count has been performed. Also, fast neutron detection technique using plastic scintillation detectors is being developed for detection of neutron sources including nuclear materials. Measurement with two rod shaped detector that placed into a cross showed better localizing capability compared with single detector. In this report, recent progresses of the project are given.
Ikeda, Nobuo*; Wakabayashi, Genichiro*; Uno, Masayoshi*; Yoshinaka, Kazuyuki
Nihon Genshiryoku Gakkai-Shi ATOMO
, 65(5), p.304 - 305, 2023/05
no abstracts in English
Koizumi, Mitsuo; Takahashi, Tone; Hironaka, Kota; Mochimaru, Takanori*; Yamaguchi, Ikuto*; Kimura, Yoshiki; Tanigaki, Minoru*; Masaki, Hiroko*; Harada, Hiroshi*; Goto, Jun*; et al.
Proceedings of INMM & ESARDA Joint Annual Meeting 2023 (Internet), 7 Pages, 2023/05
Koizumi, Mitsuo; Mochimaru, Takanori*; Takahashi, Tone; Hironaka, Kota; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*
Annual Report of Cooperative Researches at Kindai University Reactor, 2021, p.57 - 60, 2023/03
no abstracts in English
Koizumi, Mitsuo; Mochimaru, Takanori*; Hironaka, Kota; Takahashi, Tone; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*
Nuclear Instruments and Methods in Physics Research A, 1042, p.167424_1 - 167424_6, 2022/11
Times Cited Count：4 Percentile：44.71(Instruments & Instrumentation)no abstracts in English
Koizumi, Mitsuo; Takahashi, Tone; Hironaka, Kota; Mochimaru, Takanori*; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*
Annual Report of Cooperative Researches at Kindai University Reactor, 2020, p.76 - 80, 2021/12
no abstracts in English
Mochimaru, Takanori*; Koizumi, Mitsuo; Takahashi, Tone; Hironaka, Kota; Kimura, Yoshiki; Sato, Yuki; Terasaka, Yuta; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*
Dai-42-Kai Nihon Kaku Busshitsu Kanri Gakkai Nenji Taikai Kaigi Rombunshu (Internet), 4 Pages, 2021/11
no abstracts in English
Ito, Chikara; Ito, Keisuke; Ishikawa, Takashi; Yoshida, Akihiro; Sanada, Yukihisa; Torii, Tatsuo; Notomi, Akihiro*; Wakabayashi, Genichiro*; Miyazaki, Nobuyuki*
Hoshasen, 39(1), p.7 - 11, 2013/09
no abstracts in English
Uozumi, Yusuke*; Sawada, Yusuke*; Mzhavia, A.*; Nogamine, Sho*; Iwamoto, Hiroki; Kin, Tadahiro; Hohara, Shinya*; Wakabayashi, Genichiro*; Nakano, Masahiro*
Physical Review C, 84(6), p.064617_1 - 064617_11, 2011/12
Times Cited Count：21 Percentile：73.64(Physics, Nuclear)Deuteron production from intermediate-energy proton-nucleus interactions was investigated through experiments and model calculations, mainly to develop a theoretical model by elucidating the mechanism of cluster production. Spectral double-differential cross sections were measured for inclusive (
, 
) reactions on five targets in the periodic table, namely 
C, 
Al, 
V, 
Nb, and 
Au, at beam energies of 300 and 392 MeV. The cross sections were determined in almost the entire outgoing energy range from the highest down to 30 MeV and at laboratory angles from 20
to 104. To interpret the measured spectra, we proposed a new model that includes the nucleon correlations of the initial- and final-state interactions to describe cluster knockout and pickup within the intranuclear cascade model. The results of the model calculations showed reasonable agreements with those of the experiments. Moreover, the model indicated reasonable predictive power for the (, 
He
), (, 
), and (
, ) reactions measured elsewhere.
Iwamoto, Hiroki; Imamura, Minoru*; Koba, Yusuke*; Fukui, Yoshinori*; Wakabayashi, Genichiro*; Uozumi, Yusuke*; Kin, Tadahiro; Iwamoto, Yosuke; Hohara, Shinya*; Nakano, Masahiro*
Physical Review C, 82(3), p.034604_1 - 034604_8, 2010/09
Times Cited Count：13 Percentile：61.35(Physics, Nuclear)We investigate proton-production double-differential cross sections (DDXs) for 300- and 392-MeV proton-induced reactions on O, V, Tb, Ta, Au, Pb, and Bi. Emitted proton energies are measured with stacked scintillator spectrometers by the 
- technique. Experimental results are compared with the intranuclear cascade (INC) and quantum molecular dynamics models. Although both models can reproduce spectral DDXs, there is a difference at the most forward and backward angles. The cause of these differences is discussed in terms of the refraction caused by the nuclear potential. Angular distributions of the present data are well accounted for by the Kalbach systematics plus INC one-step calculations. The quasi-free-scattering contribution increases with decreasing target mass and increasing emission energy.
Hironaka, Kota; Koizumi, Mitsuo; Mochimaru, Takanori*; Takahashi, Tone; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*
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Koizumi, Mitsuo; Takahashi, Tone; Mochimaru, Takanori*; Yamaguchi, Ikuto*; Yoshimi, Yuki*; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*; Tanigaki, Minoru*; Harada, Hiroshi*; Masaki, Hiroko*; et al.
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Takahashi, Tone; Koizumi, Mitsuo; Hironaka, Kota; Kimura, Yoshiki; Mochimaru, Takanori*; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*
no journal, ,
no abstracts in English
Mochimaru, Takanori*; Takahashi, Tone; Koizumi, Mitsuo; Hironaka, Kota; Kato, Keigo*; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*
no journal, ,
no abstracts in English
Takahashi, Tone; Koizumi, Mitsuo; Hironaka, Kota; Mochimaru, Takanori*; Sato, Yuki; Terasaka, Yuta; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*
no journal, ,
Takahashi, Tone; Koizumi, Mitsuo; Tomikawa, Hirofumi; Kimura, Yoshiki; Sato, Yuki; Terasaka, Yuta; Torii, Tatsuo; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*
no journal, ,
no abstracts in English
Takahashi, Tone; Koizumi, Mitsuo; Mochimaru, Takanori*; Yamaguchi, Ikuto*; Yoshimi, Yuki*; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*; Tanigaki, Minoru*; Harada, Hiroshi*; Masaki, Hiroko*; et al.
no journal, ,
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Yamaguchi, Ikuto*; Koizumi, Mitsuo; Takahashi, Tone; Mochimaru, Takanori*; Yoshimi, Yuki*; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*; Tanigaki, Minoru*; Harada, Hiroshi*; Masaki, Hiroko*; et al.
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Mochimaru, Takanori*; Yamaguchi, Ikuto*; Koizumi, Mitsuo; Takahashi, Tone; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*
no journal, ,
no abstracts in English
Mochimaru, Takanori*; Koizumi, Mitsuo; Takahashi, Tone; Yamaguchi, Ikuto*; Yoshimi, Yuki*; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*; Tanigaki, Minoru*; Harada, Hiroshi*; Masaki, Hiroko*; et al.
no journal, ,
no abstracts in English
