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Kurono, Taihei*; Takami, Seiichi*; Kubo, Masaki*; Kurita, Keisuke; Iikura, Hiroshi; Harayama, Isao
Journal of Supercritical Fluids, 235, p.106978_1 - 106978_9, 2026/09
Times Cited Count：0 Percentile：0.00(Chemistry, Physical)Fumoto, Koji*; Okubo, Kento*; Oshima, Shotaro*; Hatamoto, Asami*; Kurita, Keisuke; Harayama, Isao; Iikura, Hiroshi
Journal of Visualization, 29(1), p.1 - 12, 2026/02
Times Cited Count：0 Percentile：0.00(Computer Science, Interdisciplinary Applications)
TaShizuma, Toshiyuki*; Omer, M.; Hajima, Ryoichi*; Koizumi, Mitsuo
Physical Review C, 109(5), p.054320_1 - 054320_8, 2024/05
Times Cited Count：2 Percentile：37.47(Physics, Nuclear)
NiShizuma, Toshiyuki*; Omer, M.; Hayakawa, Takehito*; Minato, Futoshi*; Matsuba, Shunya*; Miyamoto, Shuji*; Shimizu, Noritaka*; Utsuno, Yutaka
Physical Review C, 109(1), p.014302_1 - 014302_7, 2024/01
Times Cited Count：7 Percentile：79.27(Physics, Nuclear)Omer, M.; Shizuma, Toshiyuki*; Koizumi, Mitsuo; Taira, Yoshitaka*; Zen, H.*; Ogaki, Hideaki*; Hajima, Ryoichi
UVSOR-50, P. 37, 2023/08
no abstracts in English
Omer, M.; Shizuma, Toshiyuki*; Hajima, Ryoichi*; Koizumi, Mitsuo
Nihon Kaku Busshitsu Kanri Gakkai Dai-40-Kai Nenji Taikai Puroshideingusushu, p.59 - 62, 2019/11
Seya, Michio; Hajima, Ryoichi*; Kureta, Masatoshi
Proceedings of INMM 58th Annual Meeting (Internet), 10 Pages, 2017/07
Large size freight cargo containers are the most vulnerable items from nuclear security points of view because of their large volume and weight of cargo inside for hiding heavily shielded objects. For strengthening nuclear security, secure detection of NMs in heavily shielded objects, and safe handling (dismantlement) of detected (suspicious) objects, are essential. These require secure detection of NMs, inspection of detailed interior structures of detected objects, rough characterization of NMs (for nuclear bomb or RDD etc.) and confirmation of existence of explosives etc. By using information obtained by these inspections, safe dismantlement of objects is possible. In this paper, we propose a combination of X-ray scanning system with NRF-based NDD system using monochromatic 
-ray beam for a secure detection and interior inspections. We also we propose active neutron NDA system using a DT source for interior inspection of NM part.
Seya, Michio; Hajima, Ryoichi*; Kureta, Masatoshi
Dai-37-Kai Kaku Busshitsu Kanri Gakkai Nihon Shibu Nenji Taikai Rombunshu (CD-ROM), 10 Pages, 2017/02
Large size freight cargo containers are the most volunurable items from nuclear security points of view because of their large volume and weight of cargo inside for hiding heavily shielded objects. For strengthning nuclear security, secure detection of NMs in heavily shielded objects, and safe handling (dismatlement) of detected / suspicious objects for taking out of NMs, are essential. These require the following things, (1) Introduction of secure detection system of NMs, (2) Inspection of deteiled and interior structures of detected objects, (3) Rough chracterization of NMs (for nuclear bomb or RDD etc.) / Confirmation of existence of explosives etc.. By using information obtained by interior inspections, safe dismantlement of objects and taking NMs out are possible. In this papaer, we propose a combined system of X-ray scanning system with NRF-based NDD system using monochromatic -ray beam not only as a secure detection system of NMs but also interior inspection system (covering (1) and (2)). Also we propose active neutron NDA system using a D-T source for interior inspection of NM part (covering (3)).
Iikura, Hiroshi; Sakai, Takuro; Matsubayashi, Masahito
Hamon, 25(4), p.277 - 282, 2015/11
We introduce the basic principle of neutron radiography technique, and the brief review of its applications. Most of works in this article have been performed at TNRF, Tokai, Japan. Neutron radiography is a nondestructive testing method, so that this technique is used for not only academic studies but also industrial applications. Keywords: neutron radiography, imaging, TNRF
Seya, Michio; Koizumi, Mitsuo; Tomikawa, Hirofumi; Naoi, Yosuke; Kureta, Masatoshi; Harada, Hideo; Hajima, Ryoichi; Nakamura, Hironobu
Proceedings of INMM 56th Annual Meeting (Internet), 10 Pages, 2015/07
ISCN of JAEA has conducted (with collaborations with JAEA other centers) the following development programs of advanced NDA technologies since its establishment. (1) Measurement test of the using PNAR-NDA system for Fugen spent fuel assemblies, (2) Basic development of NRF-NDA technologies using LCS -rays, (3) Development of alternative to 
He neutron detection technology, (4) Development of neutron resonance densitometry. ISCN has just started the following new programs (also with collaborations with JAEA other centers). (5) Demonstration of NRF-non-destructive detection technology for nuclear security using LCS -rays, (6) Development of active neutron NDA techniques using a pulsed neutron (D-T) source, (7) Feasibility study on monitoring of high active liquid waste in tanks inside cell. This paper presents the results of basic technology development programs already done and introduces above new programs.
Seya, Michio; Kobayashi, Naoki; Naoi, Yosuke; Hajima, Ryoichi; Soyama, Kazuhiko; Kureta, Masatoshi; Nakamura, Hironobu; Harada, Hideo
Book of Abstracts, Presentations and Papers of Symposium on International Safeguards; Linking Strategy, Implementation and People (Internet), 8 Pages, 2015/03
JAEA-ISCN has been implementing basic development programs of the advanced NDA technologies for nuclear material (NM) since 2011JFY (Japanese Fiscal Year), which are (1) NRF (Nuclear resonance fluorescence) NDA technology using laser Compton scattered (LCS) -rays (intense mono-energetic -rays), (2) Alternative to He neutron detection technology using ZnS/B
O
ceramic scintillator, and (3) NRD (Neutron resonance densitometry) using NRTA (Neutron resonance transmission analysis) and NRCA (Neutron resonance capture analysis). These programs are going to be finished in 2014JFY and have demonstration tests in February - March 2015.
Seya, Michio; Kureta, Masatoshi; Soyama, Kazuhiko; Nakamura, Hironobu; Harada, Hideo; Hajima, Ryoichi
Proceedings of INMM 55th Annual Meeting (Internet), 10 Pages, 2014/07
JAEA has been implementing development programs of basic technologies of the following advanced NDA (non-destructive assay) of nuclear material (NM) for nuclear safeguards and security. (1) Alternative to He neutron detection using ZnS/BO ceramic scintillator, (2) NRD (neutron resonance densitometry) using NRTA (neutron resonance transmission analysis) and NRCA (neutron resonance capture analysis), (3) NRF (nuclear resonance fluorescence)-NDA using laser Compton scattered (LCS) -rays (intense mono-energetic -rays). The development program (1) is for NDA systems that use ZnS/BO ceramic scintillator as alternative neutron detector to He for coming shortage of its supply. The program (2) is for a NDA system of isotopic composition measurement (non-destructive mass spectroscopy) in targets such as particle-like melted fuel debris using NRTA and NRCA. The program (3) is for NDA systems using a specific NRF reaction of certain Pu/U isotope caused by mono-energetic LCS -ray with energy tuned to the specific excited state of the isotope. This paper introduces above three programs.
Omer, M.
no journal, ,
This presentation details the development of active non-destructive analysis (NDA) technology that utilizes nuclear resonance fluorescence (NRF) driven by quasi-monochromatic -ray beams from laser Compton scattering (LCS). Results from a quantitative isotopic analysis of metallic hafnium (Hf) and tungsten (W) are presented as a demonstration of the technique. High-precision detection of even-mass isotopes was achieved, with measured abundance deviations from reference values ranging between 0.18
and 1.36. These results confirm the efficacy of LCS-NRF for isotopic quantification in nuclear security and safeguards applications. This work is a contribution of the JAEA to the International Atomic Energy Agency (IAEA) under the agreement of the coordinated research program (CRP), J02015 (Facilitation of Safe and Secure Trade Using Nuclear Detection Technology - Detection of RN and Other Contraband). This work was a part of a study of the nuclear resonance fluorescence aiming at nuclear security and safeguards applications, being supported by the subsidiary for "promotion of strengthening nuclear security or the like" of the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan.
Omer, M.; Shizuma, Toshiyuki*; Hajima, Ryoichi*; Koizumi, Mitsuo
no journal, ,
Shizuma, Toshiyuki*; Omer, M.; Hajima, Ryoichi*; Koizumi, Mitsuo; Zen, H.*; Ogaki, Hideaki*; Taira, Yoshitaka*
no journal, ,
Koizumi, Mitsuo
no journal, ,
no abstracts in English
Nishimoto, Kai*; Zen, H.*; Ogaki, Hideaki*; Shizuma, Toshiyuki*; Omer, M.; Hayakawa, Takehito*
no journal, ,
Our research group has been studying isotope CT imaging, and is currently working on simultaneous imaging of multiple isotopes. For this purpose, we have devised a method (Flat-LCS) that uses the helical undulator of the storage ring to broaden the energy distribution and reduce the spatial dependence of gamma-ray energy while keeping the beam diameter of a normal laser Compton gamma ray small, and have been conducting experiments at UVSOR. In this study, we measured the isotope abundance ratio of natural lead using the F-LCS beam and the normal LCS, and we report the results.
Hf and 
W isotopesOmer, M.; Shizuma, Toshiyuki*; Hajima, Ryoichi*; Koizumi, Mitsuo
no journal, ,
Matsumoto, Ryosuke*; Fujikawa, Naoto*; Oda, Yutaka*; Kurita, Keisuke; Iikura, Hiroshi; Harayama, Isao
no journal, ,
no abstracts in English
Omer, M.
no journal, ,
