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} polyoxo cluster UO
Cl
(MeO)
(x = 2.3, MeO = methoxide)Fichter, S.*; Radoske, T.*; 池田 篤史
Acta Crystallographica Section E; Crystallographic Communications (Internet), 77(8), p.847 - 852, 2021/08
A new type of polyoxo cluster complex that contains thirteen uranium atoms, {U}, was synthesised and characterised as [U(
-O
)(-O
)
(-O)
Cl(O)
] (x = 2.3, MeO = methoxide) (I). The complex crystallises from methanol containing tetravalent uranium (U
) with a basic organic ligand. The characterised {U} polyoxo cluster complex possesses a single cubic uranium polyhedron at the centre of the cluster core. The observed shortening of U-O bonds, together with BVS calculations and the overall negative charge (2-) of (I), suggests that the central uranium atom in (I), that forms the single cubic polyhedron, is presumably oxidised to the pentavalent state (U
) from the original tetravalent state (U). Complex I is, hence, the first example of a polyoxo cluster possessing a single cubic coordination polyhedron of U.
花田 磨砂也
プラズマ・核融合学会誌, 78(6), p.541 - 547, 2002/06
核融合用に開発したイオンビーム技術は、材料産業に応用されている。現在は、主に正イオンが用いられており、イオンドーピングによる材料の改質や微細加工に応用されている。最近、負イオン生成技術の開発はめざましく進展し、産業への応用が期待されている。原研では、ITER用に開発したMeV級負イオン源を用いて、世界で初めて、10ミクロン厚さの単結晶シリコン板の製作に成功した。本技術により、次世代半導体基板製作の開発が促進されると期待されている。本稿では、ビームによる半導体単結晶薄板製作技術を中心に、核融合で開発したイオンビームの応用について解説する。
田村 浩司; 中西 隆造; 大場 弘則; 佐伯 盛久; 田口 富嗣*; Lim, H. H.*; 平等 拓範*; 若井田 育夫
no journal, ,
For the remote inspection in harsh radiation environment, laser induce breakdown spectroscopy (LIBS) system has been developed, where micro-chip laser (MCL) using a Nd:YAG/Cr:YAG composite was utilized. A ceramics composite is considered effective as a laser medium for the system because ceramics has many advantageous features (machinable, scalable, etc). In this study, for the development of the remote LIBS system, radiation effects to the optical properties of Nd:YAG ceramics and single crystal (SC) were measured and compared. Transmission spectra were measured and effects by gamma ray irradiation and temperature change were examined.
