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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
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:0 Percentile:0.01(Nuclear Science & Technology)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
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:0 Percentile:0.02(Instruments & Instrumentation)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:6 Percentile:93.39(Physics, Multidisciplinary)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
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:5 Percentile:81.82(Nuclear Science & Technology)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
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:2 Percentile:48.47(Instruments & Instrumentation)no abstracts in English
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
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:5 Percentile:35.86(Chemistry, Multidisciplinary)The BaTiO 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
depends on the particle size of the raw material of TiO
. Succeeded in synthesizing 100 nm size BaTiO
nanocrystals showing uniform particle size distribution using TiO
nanoparticles with optimized particle size. The obtained BaTiO
nanocrystal is a tetragonal system of ferroelectric phase. A three-dimensional structure of BaTiO
nanoparticles could be obtained by the electron beam tomography.
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
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.
Ito, Fumiaki*; Lee, J.; Hironaka, Kota; Takahashi, Tone; Suzuki, Satoshi*; Hori, Junichi*; Terada, Kazushi*; Koizumi, Mitsuo
KURNS Progress Report 2020, P. 98, 2021/08
A compact Nuclear Resonance Transmission Analysis (NRTA) system using a Laser Driven Neutron Source (LDNS) has been developed as a part of the development of nuclear non-proliferation technology supported by the MEXT. In NRTA, the neutron energy emitted from a pulsed neutron source is measured using the time-of-flight (TOF) method. LDNS is of interest because of its short pulse width, which is necessary for accurate TOF measurements over short flight distances. In the short-distance TOF measurement, there will be a large gamma-ray background event due to the coincidence of the timing of the arrival of 2.2 MeV gamma-rays due to neutron capture on hydrogen in the moderator and the timing of the arrival of neutrons around the resonance energy. Since the LDNS is still under development, the neutron flux is not sufficient and it is desirable to use a detector with high detection efficiency. For these reasons, we have developed a detector with low efficiency to gamma-rays and high efficiency to neutrons (multilayer neutron detector). As one of the results of this year's experiments, we confirmed that the multilayer neutron detector have low sensitivity to gamma-rays.
伊藤 史哲; Lee, J.; 弘中 浩太; 小泉 光生
not registered
【課題】高いN/γ選択性で、高線量の中性子を高効率で測定できる中性子検出器を得る。 【解決手段】このシンチレータ10は、Z方向において、蛍光体層11と光透過層12とが交互に積層された積層構造を具備する。蛍光体層11は、中性子を吸収することによって蛍光を発する蛍光体で構成され、この材料は、例えば従来より知られる中性子検出用のシンチレータの材料である。光透過層12は、この蛍光体が発した蛍光の透過率が高く中性子の吸収が小さい材料で構成される。このシンチレータ10では、中性子、γ線光子が入射した場合に、発光強度(パルス波高)が、中性子とγ線光子とで大きく異なる。これによって、両者の出力の弁別を容易に行うことができる。
伊藤 史哲; Lee, J.; 弘中 浩太; 小泉 光生
not registered
To obtain a neutron detector capable of measuring high dose neutrons with high neutron/gamma-ray discrimination ability and high efficiency. A scintillator 10 has a layered structure in which a phosphor layer 11 and a light transmission layer 12 are alternatelylaminatedin z direction. The phosphor layer 11 is made of a phosphor material emitting fluorescent light by absorbing neutrons, the material being, for example, a scintillator material used in neutron detectors having alreadybeen known. The light transmission layer 12 is made of a material highly transmitting fluorescent light emitted by the phosphor materialand only slightlyabsorbingneutrons. In the scintillator 10, when neutrons and gamma-ray photons enter it, luminescence intensity (pulse height) due to neutrons is significantly different from that due to gamma-ray photons. It makes it easy to discriminate between outputs due to the two kinds of radiations.
Yamaguchi, Ikuto*; Koizumi, Mitsuo; Takahashi, Tone; Hironaka, Kota; Mochimaru, Takanori*
no journal, ,
no abstracts in English
Lee, J.; Hironaka, Kota; Kodama, Yu; Rossi, F.; Koizumi, Mitsuo; Hori, Junichi*; Sano, Tadafumi*
no journal, ,
no abstracts in English