Valence-selective XAFS spectroscopy of lanthanides using "the forgotten emission line", L_<γ4>
Project/Area Number |
20350039
|
Research Category |
Grant-in-Aid for Scientific Research (B)
|
Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Analytical chemistry
|
Research Institution | Japan Women's University |
Principal Investigator |
HAYASHI Hisashi Japan Women's University, 理学部, 准教授 (60250833)
|
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)
|
Project Period (FY) |
2008 – 2010
|
Project Status |
Completed (Fiscal Year 2010)
|
Budget Amount *help |
¥20,670,000 (Direct Cost: ¥15,900,000、Indirect Cost: ¥4,770,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2008: ¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000)
|
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 |
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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Report
(4 results)
Research Products
(27 results)