Valence state of Am in (U $_{0.95}$ Am $_{0.05}$ )O $_{2.0}$

Nishi, Tsuyoshi; Nakada, Masami ; Suzuki, Chikashi ; Shibata, Hiroki ; Okamoto, Yoshihiro ; Akabori, Mitsuo; Hirata, Masaru

The XAFS measurements at U-L $_{3}$ and Am-L $_{3}$ absorption edge of (U $_{0.95}$ Am $_{0.05}$ )O $_{2.0}$ were performed in transmission mode. Moreover, to clarify the valence state of Am in (U,Am)O $_{2-x}$ , the XANES spectrum of Am-L $_{3}$ absorption edge of (U $_{0.95}$ Am $_{0.05}$ )O $_{2.0}$ was verified using those of Am-L $_{3}$ absorption edge of AmO $_{2}$ and Am $_{2}$ O $_{3}$ . It was found that the XANES spectrum of the Am-L $_{3}$ edge of (U $_{0.95}$ Am $_{0.05}$ )O $_{2.0}$ is in good accordance with that of Am $_{2}$ O $_{3}$ . Thus, Am in (U $_{0.95}$ Am $_{0.05}$ )O $_{2.0}$ is almost trivalent state.

Language	:	English
Journal	:	Journal of Nuclear Materials
Volume	:	418
Number	:	1-3
Pages	:	p.311 - 312
Publication Year/Month	:	2011/11
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Paper URL	:	https://doi.org/10.1016/j.jnucmat.2011.07.016
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Keywords	:	no keyword
Research Facility	:	WASTEF(廃棄物安全試験施設)
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Registration No. : AA20110273
JAEA Abstracts No. : 39001396
Paper Submission No. : 9679

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Valence state of Am in (UAm)O

Valence state of Am in (U $_{0.95}$ Am $_{0.05}$ )O $_{2.0}$