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Journal Articles

Deuterium permeation behavior for damaged tungsten by ion implantation

Oya, Yasuhisa*; Li, X.*; Sato, Misaki*; Yuyama, Kenta*; Oyaizu, Makoto; Hayashi, Takumi; Yamanishi, Toshihiko; Okuno, Kenji*

Journal of Nuclear Science and Technology, 53(3), p.402 - 405, 2016/03

https://doi.org/10.1080/00223131.2015.1052583

Times Cited Count：11 Percentile：65.33(Nuclear Science & Technology)

The deuterium (D) permeation behaviors for ion damaged tungsten (W) by 3 keV D $_{2}$ $^{+}$ and 10 keV C $^{+}$ were studied. The D permeability was obtained for un-damaged W at various temperatures. For both D $_{2}$ $^{+}$ and C $^{+}$ implanted W, the permeability was clearly reduced. But, for the D $_{2}$ $^{+}$ implanted W, the permeability was recovered by heating at 1173 K and it was almost consistent with that for un-damaged W. In the case of C $^{+}$ implanted W, the permeability was not recovered even if the sample was heated at 1173 K, indicating that the existence of carbon would prevent the recovery of permeation path in W. In addition, TEM observation showed the voids were grown by heating at 1173 K and not removed, showing the existence of damages would not largely influence on the hydrogen permeation behavior in W in the present study.

Journal Articles

Suppression of temperature hysteresis in negative thermal expansion compound BiNi $_{1-x}$ Fe $_{x}$ O $_{3}$ and zero-thermal expansion composite

Nabetani, Koichiro*; Muramatsu, Yuya*; Oka, Kengo*; Nakano, Kiho*; Hojo, Hajime*; Mizumaki, Masaichiro*; Agui, Akane; Higo, Yuji*; Hayashi, Naoaki*; Takano, Mikio*; et al.

Applied Physics Letters, 106(6), p.061912_1 - 061912_5, 2015/02

https://doi.org/10.1063/1.4908258

Times Cited Count：67 Percentile：89.08(Physics, Applied)

Negative thermal expansion (NTE) of BiNi $_{1_x}$ FeO is investigated by dilatometric curves, synchrotron X-ray diffraction, and X-ray absorption spectroscopy. All samples (x=0.05-0.15) shows large NTE with the coefficient of linear thermal expansion which induced by charge transfer between Bi $^{5+}$ and Ni $^{2+}$ in the controlled temperature range near room temperature. Compared with Bi $_{1_x}$ LnNiO (Ln: rare-earth elements), the thermal hysteresis that causes a problem for practical application is suppressed because random distribution of Fe in the Ni site changes the first order transition to second order-like transition.

Journal Articles

Large ferroquadrupole moment induced in the octupole-ordered Ce $_{0.7}$ La $_{0.3}$ B revealed by high-resolution X-ray diffraction

Inami, Toshiya; Michimura, Shinji*; Hayashi, Yuya*; Matsumura, Takeshi*; Sera, Masafumi*; Iga, Fumitoshi*

Physical Review B, 90(4), p.041108_1 - 041108_5, 2014/07

https://doi.org/10.1103/PhysRevB.90.041108

Times Cited Count：9 Percentile：35.96(Materials Science, Multidisciplinary)

We carried out a high-resolution X-ray diffraction experiment on Ce $_{0.7}$ La $_{0.3}$ B. This compound exhibits antiferro-octupole order (AFO) below = 1.4 K, and it is theoretically suggested that ferroquadrupole moments and a resultant rhombohedral deformation are induced in the AFO phase. We observe the splitting of Bragg reflections below and find that the unit cell is rhombohedral with the elongated [111] axis. We also precisely evaluate the magnitude of the induced quadrupole moments from the obtained shear strain and find that the quadrupole moments are not reduced in the AFO phase.

Journal Articles

Magnetic-field-induced charge order in the filled skutterudite SmRu $_{4}$ P $_{12}$ ; Evidence from resonant and nonresonant X-ray diffraction

Matsumura, Takeshi*; Michimura, Shinji*; Inami, Toshiya; Hayashi, Yuya*; Fushiya, Kengo*; Matsuda, Tatsuma*; Higashinaka, Ryuji*; Aoki, Yuji*; Sugawara, Hitoshi*

Physical Review B, 89(16), p.161116_1 - 161116_5, 2014/04

https://doi.org/10.1103/PhysRevB.89.161116

Times Cited Count：15 Percentile：50.92(Materials Science, Multidisciplinary)

The antiferromagnetic ordered phase below $T_{rm MI}$ = 16.5 K and the unresolved intermediate phase between $T_{rm MI}$ and (= 14 K) in SmRuP $_{12}$ have been studied by resonant and nonresonant X-ray diffraction. In the intermediate phase, nonresonant Thomson scattering with = (1,0,0) is induced by applying a magnetic field. This phenomena is caused by atomic displacements reflecting the charge order in the band, as predicted theoretically. Simultaneously, the antiferromagnetic moment of Sm is enhanced along the field direction, which is considered to reflect the staggered ordering of the - crystal-field states. The present results show that the orbital-dependent - hybridization in association with the nesting instability in the band gives rise to the unconventional charge order similarly with PrRuP $_{12}$ and PrFeP $_{12}$ .

JAEA Reports

Horonobe Underground Research Laboratory project research and development plan in Phase 2; H20-21

Iwatsuki, Teruki; Sato, Haruo; Tanai, Kenji; Inagaki, Manabu; Sawada, Atsushi; Niinuma, Hiroaki; Ishii, Eiichi; Maekawa, Keisuke; Tomura, Goji; Sanada, Hiroyuki; et al.

JAEA-Research 2009-002, 156 Pages, 2009/05

JAEA-Research-2009-002.pdf:12.86MB

The research and development plan for geological investigation, engineering technology and safety assessment during the drilling of a shaft down to intermediate depth are summarized according to the Midterm Plan till 2009 Fiscal year of JAEA. This report describes subject, current status and programme in the "Phase 2: Construction phase" (investigations during construction of the underground facilities). Furthermore regarding R&D plan in next Midterm Plan of JAEA, preliminary ideas are summarized.

Journal Articles

(), a novel hypernodulation mutant of affected in vascular tissue organization and floral induction

Kira, Erika*; Tateno, Kumiko*; Miura, Kinichiro*; Haga, Tatsuya*; Hayashi, Masaki*; Harada, Kyuya*; Sato, Shusei*; Tabata, Satoshi*; Shikazono, Naoya; Tanaka, Atsushi; et al.

Plant Journal, 44(3), p.505 - 515, 2005/11

https://doi.org/10.1111/j.1365-313X.2005.02543.x

Times Cited Count：94 Percentile：86.28(Plant Sciences)

no abstracts in English

Oral presentation

High-resolution X-ray diffraction experiment on the octupole ordered phase in Ce $_{0.7}$ La $_{0.3}$ B

Inami, Toshiya; Michimura, Shinji*; Matsumura, Takeshi*; Hayashi, Yuya*; Sera, Masafumi*; Iga, Fumitoshi*

no journal, ,

We have carried out a high-resolution X-ray diffraction experiment at low temperatures and in magnetic fields on Ce $_{0.7}$ La $_{0.3}$ B that exhibits antiferrooctupole (AFO) order below =1.4K. Ferroquadrupole moments that accompany the AFO order and a resultant rhombohedral deformation of the cubic lattice were theoretically predicted and experimetanlly supported. However, the sign and magnitude of the rhombohedral deformation have not yet been determined. We observe the splitting of Bragg peaks below , which is consistent with a rhombohedral deformation of 4 $times10^{-5}$ elongated along the [111] axis. The response of rhombohedral domains to magnetic fields also well agrees with theoretical calculations. A particular outcome of this experiment is that the magnitude of the induced quadrupole moments is precisely evaluated from the obtained shear strain.

Oral presentation

Radioactive waste engineering

Tajiri, Tsuyoshi; Kiyota, Shiko; Hayashi, Hirokazu; Koda, Yuya

no journal, ,

An abolition measure is introduced in the "radioactive waste engineering" lecture in Fukui University of Technology. The situation of the abolition measure of a nuclear power plant, the abolition measure plan of "Fugen", and the abolition measure of "Fugen" is entitled, and a lecture is performed 3 times. The 1st time: The system of an abolition measure, the outline of technical 2nd: "Fugen" which is needed for the track record abolition measure of an abolition measure in and outside the country, The outline of the abolition measure plan of "Fugen", residual-radioactivity evaluation, the 3rd time of safety evaluation: The principal technologies in an abolition measure, system decontamination, remote-dismantling technology of a nuclear reactor main part, technology applied to the abolition measure of "Fugen" with the situation

Oral presentation

Rhombohedral deformation of Ce $_{0.7}$ La $_{0.3}$ B observed by high-resolution X-ray diffraction

Inami, Toshiya; Michimura, Shinji*; Hayashi, Yuya*; Matsumura, Takeshi*; Sera, Masafumi*; Iga, Fumitoshi*

no journal, ,

no abstracts in English

Oral presentation

Rhombohedral deformation in the phase IV of Ce $_{0.7}$ La $_{0.3}$ B observed by high-resolution X-ray diffraction

Inami, Toshiya; Michimura, Shinji*; Hayashi, Yuya*; Matsumura, Takeshi*; Sera, Masafumi*; Iga, Fumitoshi*

no journal, ,

no abstracts in English

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Deuterium permeation behavior for damaged tungsten by ion implantation

Suppression of temperature hysteresis in negative thermal expansion compound BiNi $_{1-x}$ Fe $_{x}$ O $_{3}$ and zero-thermal expansion composite

Large ferroquadrupole moment induced in the octupole-ordered Ce $_{0.7}$ La $_{0.3}$ B revealed by high-resolution X-ray diffraction

Magnetic-field-induced charge order in the filled skutterudite SmRu $_{4}$ P $_{12}$ ; Evidence from resonant and nonresonant X-ray diffraction

Horonobe Underground Research Laboratory project research and development plan in Phase 2; H20-21

(), a novel hypernodulation mutant of affected in vascular tissue organization and floral induction

High-resolution X-ray diffraction experiment on the octupole ordered phase in Ce $_{0.7}$ La $_{0.3}$ B

Radioactive waste engineering

Rhombohedral deformation of Ce $_{0.7}$ La $_{0.3}$ B observed by high-resolution X-ray diffraction

Rhombohedral deformation in the phase IV of Ce $_{0.7}$ La $_{0.3}$ B observed by high-resolution X-ray diffraction