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Kasamatsu, Yoshitaka*; Toyoshima, Atsushi; Asai, Masato; Tsukada, Kazuaki; Li, Z.; Ishii, Yasuo; Tome, Hayato*; Sato, Tetsuya; Kikuchi, Takahiro; Nishinaka, Ichiro; et al.
Chemistry Letters, 38(11), p.1084 - 1085, 2009/10
Times Cited Count：15 Percentile：48.93(Chemistry, Multidisciplinary)We report on the characteristic anion-exchange behavior of the superheavy element dubnium (Db) with atomic number Z = 105 in HF/HNO
solution at the fluoride ion concentration [F
] = 0.003 M. The result clearly demonstrates that the fluoro complex formation of Db is significantly different from that of the group-5 homologue Ta in the 6th period of the periodic table while the behavior of Db is similar to that of the lighter homologue Nb in the 5th period.
Narushima, Takashi*; Hattori, Takanori; Kinoshita, Tomohiro*; Hinzmann, A*; Tsuji, Kazuhiko*
Physical Review B, 76(10), p.104204_1 - 104204_8, 2007/09
Times Cited Count：25 Percentile：68.43(Materials Science, Multidisciplinary)The structure of liquid Sn was investigated up to 19.4 GPa by synchrotron X-ray diffraction. Upon compression up to about 3-6 GPa, the structural features, which reflect the anisotropic local structure become less prominent; i.e., the hump on the high-
side of the first peak in the structure factor 
becomes smaller, the position of the second peak relative to that of the first peak in , 
, decreases, and the coordination number, CN, increases. These features indicate that the liquid structure changes toward a simple liquid metal upon compression. However, at higher pressures, the structural parameters nearly unchanged. The parameters in this pressure range are still deviated from their respective values for simple liquid metals. These findings suggest that, contrary to previous expectations, the liquid does not monotonically approach a simple liquid metal, but takes a relatively stable intermediate form with an anisotropic local structure before approaching a simple liquid metal. The high-pressure behavior of liquid Sn is compared to those of liquid Si and liquid Ge and the systematics in liquid group 14 elements are discussed.
Hattori, Takanori; Taga, Naohito*; Takasugi, Yukinobu*; Kinoshita, Tomohiro*; Narushima, Takashi*; Tsuji, Kazuhiko*; Kikegawa, Takumi*
Photon Factory Activity Report 2005, Part A, p.42 - 43, 2006/11
no abstracts in English
Furukawa, Tomohiro; Nishi, Yoshihisa*; Aoto, Kazumi; Kinoshita, Izumi*
JAEA-Research 2006-037, 36 Pages, 2006/06
JAEA-Research-2006-037.pdf:11.89MB
In 2002, the Japan Atomic Energy Agency (past organization name: Japan Nuclear Cycle Development Institute) was made a contract with the Central Research Institute of Electric Power Industry on the research work for utilizing technology of the lead bismuth eutectic. In the contract, research on corrosion of FBR materials in high temperature lead bismuth eutectic was performed. This work was composed of two stages. In the first stage, corrosion test of high chromium martensitic steel, which was one candidate material for structures of advanced fast reactor, was performed in oxygen controlled lead bismuth eutectic at 923K. Effect of chromium on corrosion in the lead bismuth eutectic was estimated. In this second research, corrosion test of oxide dispersion strengthened ferritic steels whose chemical compositions of chromium and aluminum were differed has been performed in the lead bismuth eutectic for up to 4,000 hours. As the results, although chromium effect on corrosion has not been observed, good corrosion resistance by aluminum oxide formation on the surface has been obtained.
Hattori, Takanori; Kinoshita, Tomohiro*; Narushima, Takashi*; Tsuji, Kazuhiko*; Katayama, Yoshinori
Physical Review B, 73(5), p.054203_1 - 054203_9, 2006/02
Times Cited Count：23 Percentile：68.23(Materials Science, Multidisciplinary)The structure of liquid CdTe was investigated at pressures up to 23.5GPa using synchrotron X-ray diffraction. The structure factor, S(Q), and the pair distribution function, g(r), drastically change in two pressure regions, 1.8-3.0 GPa and 7.0-9.0 GPa, accompanied with marked increase in the average coordination number, CN. These findings suggest that there exists at least three stable liquid forms below 23.5GPa. The pressure interval of the structural change is much smaller compared to other liquids of tetrahedrally bonded materials. Comparing the shapes of S(Q) and g(r), and other structural parameters with the respective data for the reference materials reveals that the lowest- and intermediate-pressure forms have the same local structures as the crystalline counterpart (zinc-blende-like local structure and a NaCl-like local structure), while the highest-pressure form has a different local structure from that in the crystalline form.
Nishi, Yoshihisa*; Kinoshita, Izumi*; Furukawa, Tomohiro; Aoto, Kazumi
JNC TY9400 2003-027, 19 Pages, 2004/01
JNC-TY9400-2003-027.pdf:2.08MB
Research Work for Utilizing Technology of the Lead-Bismuth Eutectic - Research on the corrosion resistance of 12 chrome steels in high temperature lead-bismuth eutectic under oxygen concentration control -
Furukawa, Tomohiro; Aoto, Kazumi; Nishi, Yoshihisa*; Kinoshita, Izumi*
no journal, ,
no abstracts in English
