2010 Fiscal Year Final Research Report
Valence-selective XAFS spectroscopy of lanthanides using "the forgotten emission line", L_<γ4>
| Project/Area Number |
20350039
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Analytical chemistry
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| Research Institution | Japan Women's University |
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Principal Investigator |
HAYASHI Hisashi Japan Women's University, 理学部, 准教授 (60250833)
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| Co-Investigator(Kenkyū-buntansha) |
KAWAMURA Naomi 高輝度光科学研究センター, 利用研究促進部門, 副主幹研究員 (40393318)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 状態選別XAFS / 価数選別XAFS / スピン選別XAFS / 化学シフト / 共鳴X線非弾性散乱 / 価数揺動材料 / ランタノイド材料 / 局所構造 |
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| Research Abstract |
We have developed novel analytical methods for the characterization of chemical states of Eu and Ce materials using highly resolved L_<γ4> emissions. Whereas the L_<γ4> emissions are very weak and hitherto neglected, we accurately obtained high-resolution (<1eV) Eu/Ce L_<γ4> emission spectra by the use of a multicrystal, multidetector spectrometer. The Eu/Ce spectra exhibited substantial differences depending on the valence state of Eu ions/on the chemical environments of the Ce ions. The applicability of the EuL_<γ4> to valence-selective XAFS spectroscopy was demonstrated through partial fluorescence yield (PFY) measurements. Possible applications of the CeL_<γ4> to the studies of charge transfers in Ce materials were suggested.
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