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Journal Articles

Using LiF crystals for high-performance neutron imaging with micron-scale resolution

Faenov, A.*; Matsubayashi, Masahito; Pikuz, T.*; Fukuda, Yuji; Kando, Masaki; Yasuda, Ryo; Iikura, Hiroshi; Nojima, Takehiro; Sakai, Takuro; Shiozawa, Masahiro*; et al.

High Power Laser Science and Engineering, 3, p.e27_1 - e27_9, 2015/10

 Times Cited Count:10 Percentile:49.47(Optics)

Journal Articles

Direct observation of lattice symmetry breaking at the hidden-order transition in URu$$_2$$Si$$_2$$

Tonegawa, Sho*; Kasahara, Shigeru*; Fukuda, Tatsuo; Sugimoto, Kunihisa*; Yasuda, Nobuhiro*; Tsuruhara, Yugo*; Watanabe, Daiki*; Mizukami, Yuta*; Haga, Yoshinori; Matsuda, Tatsuma*; et al.

Nature Communications (Internet), 5, p.4188_1 - 4188_7, 2014/06

 Times Cited Count:52 Percentile:88.94(Multidisciplinary Sciences)

Journal Articles

LiF crystals as high spatial resolution neutron imaging detectors

Matsubayashi, Masahito; Faenov, A. Ya.*; Pikuz, T.*; Fukuda, Yuji; Kato, Yoshiaki*; Yasuda, Ryo; Iikura, Hiroshi; Nojima, Takehiro; Sakai, Takuro

Nuclear Instruments and Methods in Physics Research A, 651(1), p.90 - 94, 2011/09

 Times Cited Count:8 Percentile:53.23(Instruments & Instrumentation)

Neutron imaging by color center formation in LiF crystals was applied to standard samples such as a sensitivity indicator (SI) for neutron radiography. The SI was exposed to 5 mm pinhole collimated thermal neutron beam with a LiF crystal and a neutron imaging plate (NIP) for 120 min in JRR-3 thermal neutron radiography facility. The image in NIP was read out with a readout resolution of 50 $$mu$$m. The image of SI in LiF crystal was read out with pixel size of 1.38 $$mu$$m using a laser confocal microscope. All gaps were clearly observed in the images for both LiF crystal and NIP, but small holes were not recognized for NIP. The experiment showed that LiF crystals had excellent characteristics as neutron imaging detectors such as high sensitivity, high spatial resolution, wide dynamic range and so on. In the paper, detailed characteristics of LiF crystals are compared with those of other neutron imaging detectors: NIP, a combination of fluorescent converter and cooled CCD camera.

JAEA Reports

Investigation on ductile fracture behavior of 3-inch diameter type 304 stainless steel pipe with a circumferential through-wall crack

Yasuda, Yuji; Shibata, Katsuyuki; Onizawa, Kunio; ; Oba, Toshihiro; Miyazono, S.

JAERI-M 87-068, 111 Pages, 1987/05

JAERI-M-87-068.pdf:3.0MB

no abstracts in English

Journal Articles

Investigation and evaluation of ductile fracture behaviors in LWR piping under bending load

Shibata, Katsuyuki; Yasuda, Yuji; Onizawa, Kunio; Miyazono, S.

Structural Mechanics in Reactor Technology,Vol.G, p.461 - 466, 1987/00

no abstracts in English

Oral presentation

Influence of powder particle size on characteristics of scintillation converter for neutron imaging

Yasuda, Ryo; Katagiri, Masaki; Sakai, Takuro; Hayashida, Hirotoshi; Iikura, Hiroshi; Matsubayashi, Masahito; Kawabata, Yuji*

no journal, , 

Influence of powder size on the characteristics of Gd$$_{2}$$O$$_{2}$$S and B$$_{2}$$O$$_{3}$$/ZnS(Ag) type scintillators were investigated. We prepared Gd$$_{2}$$O$$_{2}$$S powder with 3.1, 6.1, and 10.1 micro-meter in mean diameter and coated with a binder on an Al plate. Beam tests were carried out at neutron radiography facility in JRR-3 and HANARO. In the results, the intensity of scintillation light is increased with increasing the diameter. The results of B$$_{2}$$O$$_{3}$$ type will be also reported in this presentation.

Oral presentation

Visualization of current density distributions with neutron spin interferometer

Hayashida, Hirotoshi; Yamazaki, Dai; Ebisawa, Toru*; Maruyama, Ryuji; Soyama, Kazuhiko; Takenaka, Nobuyuki*; Kageyama, Masashi*; Tasaki, Seiji*; Hino, Masahiro*; Kawabata, Yuji*; et al.

no journal, , 

no abstracts in English

Oral presentation

Demonstration of magnetic imaging with neutron spin interferometer

Hayashida, Hirotoshi; Yamazaki, Dai; Ebisawa, Toru*; Maruyama, Ryuji; Soyama, Kazuhiko; Iikura, Hiroshi; Yasuda, Ryo; Sakai, Takuro; Matsubayashi, Masahito; Takenaka, Nobuyuki*; et al.

no journal, , 

no abstracts in English

Oral presentation

Visualization of magnetic field with Neutron Spin Interferometer

Hayashida, Hirotoshi; Yamazaki, Dai; Ebisawa, Toru*; Maruyama, Ryuji; Soyama, Kazuhiko; Iikura, Hiroshi; Yasuda, Ryo; Sakai, Takuro; Matsubayashi, Masahito; Takenaka, Nobuyuki*; et al.

no journal, , 

no abstracts in English

Oral presentation

Visualization of water distribution in fuel cell using neutron radiography

Hayashida, Hirotoshi; Yasuda, Ryo; Honda, Mitsunori; Nojima, Takehiro; Iikura, Hiroshi; Sakai, Takuro; Matsubayashi, Masahito; Shiozawa, Masahiro*; Nitta, Takahiro*; Isogai, Yuji*

no journal, , 

no abstracts in English

Oral presentation

Development of high spatial neutron radiography techniques for visualization inner fuel cells

Yasuda, Ryo; Hayashida, Hirotoshi; Sakai, Takuro; Honda, Mitsunori; Iikura, Hiroshi; Nojima, Takehiro; Matsubayashi, Masahito; Shiozawa, Masahiro*; Nitta, Takahiro*; Isogai, Yuji*

no journal, , 

Neutron radiography is an effective water diagnostic tool for fuel cells. For observation of water distribution in small region in fuel cells, improvement of spatial resolution of neutron radiography system is required. We fabricated the small aperture system for improvement of collimator ratio on Thermal Neutron Radiography Facility (TNRF) in JRR-3. In characteristic tests, better sharpness images were obtained by small aperture system compared with conventional radiography system.

Oral presentation

Visualization of water distribution in fuel cell using neutron radiography

Hayashida, Hirotoshi; Yasuda, Ryo; Honda, Mitsunori; Nojima, Takehiro; Iikura, Hiroshi; Sakai, Takuro; Matsubayashi, Masahito; Shiozawa, Masahiro*; Nitta, Takahiro*; Isogai, Yuji*

no journal, , 

no abstracts in English

Oral presentation

Visualization of magnetic field with neutron spin interferometer

Hayashida, Hirotoshi; Yamazaki, Dai; Ebisawa, Toru*; Maruyama, Ryuji; Soyama, Kazuhiko; Iikura, Hiroshi; Yasuda, Ryo; Sakai, Takuro; Matsubayashi, Masahito; Takenaka, Nobuyuki*; et al.

no journal, , 

no abstracts in English

Oral presentation

Direct comparison of images of organelles obtained with a fluorescence microscope and a soft X-ray microscope

Ishino, Masahiko; Kado, Masataka; Tamotsu, Satoshi*; Yasuda, Keiko*; Shinohara, Kunio*; Mikata, Yuji*; Kishimoto, Maki; Nishikino, Masaharu; Oba, Toshiyuki; Kaihori, Takeshi; et al.

no journal, , 

no abstracts in English

Oral presentation

Fate of plutonium derived from the atomic bomb detonated at Nagasaki, Japan

Iwata, Hajime*; Kawamoto, Yuji*; Sakamaki, Keiko; Yasuda, Kenichiro; Onuki, Toshihiko; Utsunomiya, Satoshi*

no journal, , 

no abstracts in English

Oral presentation

Present status of a new pulsed neutron imaging instrument in J-PARC MLF

Shinohara, Takenao; Kai, Tetsuya; Segawa, Mariko; Oi, Motoki; Oikawa, Kenichi; Harada, Masahide; Nakatani, Takeshi; Sakai, Kenji; Iikura, Hiroshi; Aizawa, Kazuya; et al.

no journal, , 

no abstracts in English

Oral presentation

Present status of a new pulsed neutron imaging instrument at J-PARC

Segawa, Mariko; Shinohara, Takenao; Kai, Tetsuya; Iikura, Hiroshi; Oi, Motoki; Oikawa, Kenichi; Harada, Masahide; Sakai, Kenji; Soyama, Kazuhiko; Aizawa, Kazuya; et al.

no journal, , 

Oral presentation

High-performance neutron imaging with microns scale resolution using LiF crystal detector

Faenov, A.*; Matsubayashi, Masahito; Pikuz, T.; Fukuda, Yuji; Kando, Masaki; Yasuda, Ryo; Iikura, Hiroshi; Nojima, Takehiro; Sakai, Takuro; Shiozawa, Masahiro*; et al.

no journal, , 

Oral presentation

Investigation of in-reactor cesium chemical behavior in TEPCO's Fukushima Daiichi Nuclear Power Station accident, 6; Simulation study on microstructure of Cs-bearing particle

Oishi, Yuji*; Nakamori, Fumihiro*; Muta, Hiroaki*; Kurosaki, Ken*; Yamanaka, Shinsuke*; Sakata, Takao*; Sato, Kazuhisa*; Yasuda, Hidehiro*; Osaka, Masahiko

no journal, , 

Simulant material of Cs-bearing particle was synthesized from the melted glass of which composition was selected based on the composition of the Cs-bearing particle. The relationship between the nucleation behavior of Franklinite (ZnFe$$_{2}$$O$$_{4}$$) and cooling speed was studied. The possibility of the formation of Franklinite phase through spinodal decomposition was also evaluated.

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