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Journal Articles

Neutron transmission measurements for silica glass at the KURNS-LINAC

Lee, J.; Rossi, F.; Kodama, Yu; Hironaka, Kota; Koizumi, Mitsuo; Sano, Tadafumi*; Matsuo, Yasunori*; Hori, Junichi*

Annals of Nuclear Energy, 211, p.111017_1 - 111017_7, 2025/02

 Times Cited Count:0 Percentile:0.00(Nuclear Science & Technology)

Journal Articles

Development of a nondestructive assay technique using a laser-driven neutron source

Koizumi, Mitsuo; Ito, Fumiaki*; Lee, J.; Hironaka, Kota; Takahashi, Tone; Suzuki, Satoshi*; Arikawa, Yasunobu*; Abe, Yuki*; Wei, T.*; Yogo, Akifumi*; et al.

Dai-45-Kai Nihon Kaku Busshitsu Kanri Gakkai Nenji Taikai Kaigi Rombunshu (Internet), 4 Pages, 2024/11

Journal Articles

Demonstration of shape analysis of neutron resonance transmission spectrum measured with a laser-driven neutron source

Koizumi, Mitsuo; Ito, Fumiaki*; Lee, J.; Hironaka, Kota; Takahashi, Tone; Suzuki, Satoshi*; Arikawa, Yasunobu*; Abe, Yuki*; Lan, Z.*; Wei, T.*; et al.

Scientific Reports (Internet), 14, p.21916_1 - 21916_9, 2024/09

 Times Cited Count:2 Percentile:64.46(Multidisciplinary Sciences)

Journal Articles

Measurement of the response of a $$^6$$Li-glass detector to gamma rays by a coincidence method

Ito, Fumiaki*; Lee, J.; Hironaka, Kota; Takahashi, Tone; Suzuki, Satoshi*; Mochimaru, Takanori*; Hori, Junichi*; Terada, Kazushi*; Koizumi, Mitsuo

Nuclear Instruments and Methods in Physics Research A, 1064, p.169465_1 - 169465_9, 2024/07

 Times Cited Count:0 Percentile:0.00(Instruments & Instrumentation)

Journal Articles

Development of a combined neutron resonance analysis technique as a nondestructive assay for fissile material quantification

Rossi, F.; Lee, J.; Kodama, Yu; Hironaka, Kota; Koizumi, Mitsuo; Hori, Junichi*; Terada, Kazushi*; Sano, Tadafumi*

Proceedings of 65th Annual Meeting of the Institute of Nuclear Materials Management (Internet), 8 Pages, 2024/07

Journal Articles

Relationship between neutron moderator and time-dependent background for neutron time-of-flight measurement

Lee, J.; Hironaka, Kota; Ito, Fumiaki*; Koizumi, Mitsuo; Hori, Junichi*; Sano, Tadafumi*

Journal of Nuclear Science and Technology, 61(1), p.23 - 30, 2024/01

 Times Cited Count:4 Percentile:71.02(Nuclear Science & Technology)

Journal Articles

Development of neutron resonance fission neutron analysis for nondestructive fissile material

Lee, J.; Kodama, Yu; Rossi, F.; Hironaka, Kota; Koizumi, Mitsuo; Hori, Junichi*; Sano, Tadafumi*

Dai-44-Kai Nihon Kaku Busshitsu Kanri Gakkai Nenji Taikai Kaigi Rombunshu (Internet), 4 Pages, 2023/11

no abstracts in English

Journal Articles

Development of monitoring technique for detection of nuclear and radioactive materials on major public events

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.

Journal Articles

Neutron resonance fission neutron analysis for nondestructive fissile material assay

Hironaka, Kota; Lee, J.; Koizumi, Mitsuo; Ito, Fumiaki*; Hori, Junichi*; Terada, Kazushi*; Sano, Tadafumi*

Nuclear Instruments and Methods in Physics Research A, 1054, p.168467_1 - 168467_5, 2023/09

 Times Cited Count:4 Percentile:71.02(Instruments & Instrumentation)

Journal Articles

Current status of a JAEA development program on nuclear and radioactive materials detection techniques in major public events

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

Journal Articles

Laser-driven neutron generation realizing single-shot resonance spectroscopy

Yogo, Akifumi*; Lan, Z.*; Arikawa, Yasunobu*; Abe, Yuki*; Mirfayzi, S. R.*; Wei, T.*; Mori, Takato*; Golovin, D.*; Hayakawa, Takehito*; Iwata, Natsumi*; et al.

Physical Review X, 13(1), p.011011_1 - 011011_12, 2023/01

 Times Cited Count:28 Percentile:96.01(Physics, Multidisciplinary)

Journal Articles

Development of neutron resonance transmission analysis using a laser accelerator driven neutron source

Ito, Fumiaki*; Lee, J.; Hironaka, Kota; Koizumi, Mitsuo; Yogo, Akifumi*

Proceedings of 19th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.137 - 140, 2023/01

no abstracts in English

Journal Articles

Designs and neutronic characteristics of an epithermal neutron moderator at ambient temperature for neutron time-of-flight measurements

Lee, J.; Ito, Fumiaki*; Hironaka, Kota; Takahashi, Tone; Suzuki, Satoshi*; Koizumi, Mitsuo

Journal of Nuclear Science and Technology, 59(12), p.1546 - 1557, 2022/12

 Times Cited Count:8 Percentile:77.83(Nuclear Science & Technology)

Journal Articles

Response characteristics of a lithium glass scintillator for gamma-ray and neutron

Lee, J.; Ito, Fumiaki*; Hironaka, Kota; Takahashi, Tone; Suzuki, Satoshi*; Koizumi, Mitsuo; Hori, Junichi*; Terada, Kazushi*

Dai-43-Kai Nihon Kaku Busshitsu Kanri Gakkai Nenji Taikai Kaigi Rombunshu (Internet), 4 Pages, 2022/11

no abstracts in English

Journal Articles

Rod-shaped pulse shape discrimination plastic scintillation detectors applied for neutron source direction survey

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:52.14(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Development of a neutron scintillator for a compact NRTA system, 2

Lee, J.; Hironaka, Kota; Ito, Fumiaki*; Takahashi, Tone; Koizumi, Mitsuo; Hori, Junichi*; Terada, Kazushi*

KURNS Progress Report 2021, P. 97, 2022/07

no abstracts in English

Journal Articles

Optimizing TiO$$_2$$ through water-soluble Ti complexes as raw material for controlling particle size and distribution of synthesized BaTiO$$_3$$ nanocubes

Nakashima, Koichi*; Hironaka, Kota*; Ouchi, Kazuma*; Ajioka, Mao*; Kobayashi, Yoshio*; Yoneda, Yasuhiro; Yin, S.*; Kakihana, Masato*; Sekino, Toru*

ACS Omega (Internet), 6(48), p.32517 - 32527, 2021/12

 Times Cited Count:7 Percentile:35.04(Chemistry, Multidisciplinary)

The BaTiO $$_3$$ nanoparticles synthesized by the hydrothermal method is examined by synchrotron X-ray and TEM observation. It was found that the particle size of synthesized BaTiO$$_3$$ depends on the particle size of the raw material of TiO$$_2$$. Succeeded in synthesizing 100 nm size BaTiO$$_3$$ nanocrystals showing uniform particle size distribution using TiO$$_2$$ nanoparticles with optimized particle size. The obtained BaTiO$$_3$$ nanocrystal is a tetragonal system of ferroelectric phase. A three-dimensional structure of BaTiO$$_3$$ nanoparticles could be obtained by the electron beam tomography.

Journal Articles

Neutron detector development for nuclear security

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

Journal Articles

Demonstration of a neutron resonance transmission analysis system using a laser-driven neutron source

Hironaka, Kota; Ito, Fumiaki*; Lee, J.; Koizumi, Mitsuo; Takahashi, Tone; Suzuki, Satoshi*; Yogo, Akifumi*; Arikawa, Yasunobu*; Abe, Yuki*

Dai-42-Kai Nihon Kaku Busshitsu Kanri Gakkai Nenji Taikai Kaigi Rombunshu (Internet), 4 Pages, 2021/11

Neutron resonance transmission analysis (NRTA) is a method for non-destructive measurement of nuclear material by using a time-of-flight (TOF) technique with a pulsed neutron source. For NRTA system to carry out the short-distance TOF measurements with high resolutions, a short-pulsed neutron source is required. Laser-driven neutron sources (LDNSs) is very suitable as such a neutron source because of its short pulse width. Moreover, the compactness of the laser system is also expected due to the remarkable development of laser technology in recent years. In the present study, we have developed a technology for applying LDNS to the NRTA system and conducted the demonstration experiment using the LFEX laser at Osaka University to investigate the feasibility of the system. In this experiment, we successfully observed the neutron resonance peaks of indium and silver samples.

Journal Articles

Monitoring technique for detection of nuclear and radioactive materials on major public events

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

45 (Records 1-20 displayed on this page)