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放射光光電子顕微鏡によるセシウムを含む粘土鉱物のナノスケール実空間分析

Nanoscale spatial analysis of Cs-containing clay minerals by means of synchrotron radiation photoemission electron microscopy

吉越 章隆 

Yoshigoe, Akitaka

セシウムが吸着した粘土鉱物の放射光光電子顕微鏡を用いたナノスケールピンポイント分析に関して招待講演の一つとして講演する。絶縁物試料であるにも関わらず、適切な処理によって、構成元素の分布を観察するとともにCsおよびFeの化学状態の精密分析に成功した。ピンポイントX線吸収スペクトルからCs吸着機構を議論する。絶縁物試料に対する放射光光電子顕微鏡の将来展望も議論する。

In this symposium, the results of nanoscale spatial analysis of clay minerals artificially containing Cs using synchrotron radiation photoemission electron microscopy are talked as an invited tutorial. Despite of its insulating properties, precise analysis of distribution maps of the constituent elements and chemical states of both Cs and Fe atoms were succeeded due to the proper sample treatments. The model of Cs adsorption into clay minerals is discussed based on the data of pinpoint X-ray absorption spectra for Cs and Fe core-levels. Future perspective of the application of synchrotron radiation photoemission electron microscopy are also talked.

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