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Oba, Yojiro; Sasaki, Hirokazu*; Yamazaki, Satoshi*; Nakasaki, Ryusuke*; Onuma, Masato*
no journal, ,
no abstracts in English
Kobata, Masaaki; Satou, Yukihiko; Okane, Tetsuo; Kawasaki, Ikuto; Yoshii, Kenji; Fukuda, Tatsuo; Osaka, Masahiko; Owada, Kenji*
no journal, ,
In order to enable chemical state analysis by hard X-ray photoelectron spectroscopy (HAXPES) for environmental samples such as radioactive microparticles collected around Fukushima Daiichi Nuclear Power Station, charge neutralization technique established using ion and electron coaxial irradiation. Using this technique, the chemical state analysis of the radioactive microparticles was realized.
Tominaga, Aki; Oba, Yojiro; Shobu, Takahisa; Owada, Kenji*; Tanida, Hajime; Konno, Azusa; Morooka, Satoshi; Motokawa, Ryuhei; Kumada, Takayuki
no journal, ,
In steel materials, it is known that precipitation of Cr rich phase hardens ferrite phase and decreases toughness in base material. Small angle X-ray scattering is a promising method for analysis of this precipitation process because the precipitate is nanometer size. However, it is usually difficult to separate the scattering between the Fe phase and Cr phase since Fe and Cr are close in atomic number. Therefore, in order to observe the state of phase separation of Cr, we developed an anomalous X-ray small angle scattering (A-SAXS) method at BL22XU.
Kobata, Masaaki; Yoshii, Kenji; Fukuda, Tatsuo; Kawasaki, Ikuto; Okane, Tetsuo; Harii, Kazuya; Ieda, Junichi; Hioki, Tomosato*; Saito, Eiji
no journal, ,
We have performed high-energy X-ray photoemission spectroscopic measurements of Pt/Y
Fe
O
(YIG) thin film showing spin Seebeck effect. This system shows intriguing properties such as anomalous Hall effect. To reveal the origin of this behavior, photoelectron spectra were taken using synchrotron radiation at the BL22XU beamline of SPring-8. It was found that the Fe 1s photoelectron peak was split into two peaks; the one arises from YIG, while the other from intermetallic compound between Fe and Pt. This result is consistent with the proposed mechanism of anomalous Hall effect. The other results will be presented at the conference.
Okamoto, Yoshihiro; Nagai, Takayuki; Shiwaku, Hideaki
no journal, ,
A simulated vitrified specimen in which waste components were highly loaded (35wt%) more than the conventional 25wt% was prepared by bottom drain test and cut into a plate shape to use in the XAFS experiment. The imaging XAFS analysis was performed to investigate the element distribution and the correlation between elements for Zr, Mo, Ru, Rh and Pd in the glass sample. Aggregation of the molybdenum compound which is called 'yellow phase' was observed, but it was relatively small, on the order of 100
m. In addition, precipitation of platinum group elements was observed, and as expected from the findings so far, the chemical form of Rh in the region where Ru is distributed in a large amount is oxide (RhO
), and that of other region is Rh metal.
Satou, Yukihiko; Kobata, Masaaki; Okane, Tetsuo; Yoshii, Kenji; Fukuda, Tatsuo; Kawasaki, Ikuto; Osaka, Masahiko; Owada, Kenji*; Sueki, Keisuke*; Ishii, Tatsuya*
no journal, ,
no abstracts in English
Morooka, Satoshi; Kanata, Hiroyuki*
no journal, ,
no abstracts in English
Yoneda, Yasuhiro; Takano, Masahide
no journal, ,
Synchrotron radiation observation of simulated debris consisting of zirconia and concrete, those are the main component of debris, was carried out. Internal structure of fuel simulated debris obtained by CT observation had two features, phase separation and crystal growth mode. From the molten state, zirconia having a high melting point is first precipitated. Zirconia heavier than concrete moved to the lower part when crystals precipitate and aggregates near the bottom surface. As a result, phase separation occurs. The phase separation is caused by the difference in the composition ratio of zirconia, and can also be observed difference in crystal growth mode by composition ratio.
Shiwaku, Hideaki; Tanida, Hajime; Tominaga, Aki; Okamoto, Yoshihiro; Yaita, Tsuyoshi
no journal, ,
no abstracts in English