Local and electronic structure of Am$$_{2}$$O$$_{3}$$ and AmO$$_{2}$$ with XAFS spectroscopy
西 剛史; 中田 正美; 鈴木 知史; 柴田 裕樹; 伊藤 昭憲; 赤堀 光雄; 平田 勝
Nishi, Tsuyoshi; Nakada, Masami; Suzuki, Chikashi; Shibata, Hiroki; Ito, Akinori; Akabori, Mitsuo; Hirata, Masaru
XAFS studies were performed in a study of americium sesquioxide (Am$$_{2}$$O$$_{3}$$) with A-type rare earth oxide structure and americium dioxide (AmO$$_{2}$$) with fluorite structure. EXAFS results for Am-L$$_{3}$$ absorption edge of Am$$_{2}$$O$$_{3}$$ and AmO$$_{2}$$ were good agreement with the crystallographic data from X-ray diffraction analysis. In order to characterize XANES in aspect of the electronic states, the theoretical assignments for the Am$$_{2}$$O$$_{3}$$ and AmO$$_{2}$$ were performed with the all-electron full potential linearized augmented plane wave (FP-LAPW) method. The theoretical XANES spectra of Am$$_{2}$$O$$_{3}$$ and AmO$$_{2}$$ well reproduced the experimental ones. In addition, it was found that the white line peak was created due to the interaction between Am-d and O-p components, and the broad peak and the tail peak were created due to the interaction between Am-d and O-d component.
使用言語 : English
掲載資料名 : Journal of Nuclear Materials
: 401
: 1-3
ページ数 : p.138 - 142
発行年月 : 2010/06
出版社名 : Elsevier
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キーワード : no keyword
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登録番号 : AA20090286
抄録集掲載番号 : 38000862
論文投稿番号 : 7500
Accesses  (From Jun. 2, 2014)
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分野:Materials Science, Multidisciplinary
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