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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

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:1 Percentile:90.46(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

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, 8 Pages, 2023/00

 Times Cited Count:0 Percentile:0.01(Nuclear Science & Technology)

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:3 Percentile:86.35(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:1 Percentile:56.43(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:4 Percentile:39.59(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

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

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

Development of a neutron sintillator for a compact NRTA system

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.

Oral presentation

Developments of neutron resonance transmission analysis using a laser driven neutron source, 3; Transmission measurements of In and Ag by a Time-of-Flight method using the LFEX laser

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

no journal, , 

We have been developing Nuclear Resonance Transmission Analysis (NRTA) using Laser Driven Neutron Source (LDNS) as a part of nuclear non-proliferation technology development supported by the MEXT (Ministry of Education, Culture, Sports, Science and Technology) subsidy program "promotion of strengthening nuclear security and the like". An LDNS, which can generate short pulsed neutrons from a small volume, is considered to potentially have large benefits for the NRTA. In order to demonstrate the NRTA using the LDNS, the transmission measurements have been carried out by the TOF method using the LFEX laser at Osaka University. The results are reported here.

Oral presentation

Developments of neutron resonance transmission analysis using a laser driven neutron source, 2; Simulation study of moderator for the LFEX laser experiments

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

no journal, , 

no abstracts in English

Oral presentation

Developments of neutron resonance transmission analysis using a laser driven neutron source, 1; Applicability of laser driven neutron source for neutron resonance transmission analysis

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

no journal, , 

Oral presentation

Development of a measurement system applicable to the technique of neutron resonance transmission analysis using a laser-driven neutron source

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

no journal, , 

no abstracts in English

Oral presentation

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

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

no journal, , 

no abstracts in English

Oral presentation

Development of neutron detector for detection of nuclear/radioactive material

Takahashi, Tone; Koizumi, Mitsuo; Hironaka, Kota; Kimura, Yoshiki; Mochimaru, Takanori*; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*

no journal, , 

no abstracts in English

Oral presentation

Technology development of a neutron resonance transmission analysis using a laser driven neutron source

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

no journal, , 

no abstracts in English

37 (Records 1-20 displayed on this page)