2020年8月28日 · Amidani and coworkers employed X-ray absorption spectroscopy (XAS) to understand the degradation process at atomic level in Eu 2+-doped BaMgAl 10 O 17. Data of high energy resolution fluorescence detected (HERFD)-XANES yielded stable structural properties of the host lattice upon irradiation, and rapid oxidation of Eu 2+ to Eu 3+ .

X射线吸收细结构光谱 (X-ray absorption fine structure, XAFS)是一种基于同步辐射光源的分析方法。 它测量的基本物理量为X射线质量吸收系数μ (E)。

2017年2月15日 · X-ray absorption spectroscopy (XAS), with its two amendment; X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS), becomes the important elemental characterization technique and known to highly sensitive to the local electronic/atomic structure and effectively overcomes the issue of sensitivity to ...

2022年3月15日 · X-ray absorption spectroscopies (XAS) are a natural choice to investigate the connection between electronic structure and physical properties, but XAS studies of the solid state lanthanides, i.e., Eu, Gd, Tb, and Dy trichlorides and oxychlorides, are scarce.

2011年12月6日 · We present a detailed study of the electronic structure of europium nitride (EuN), comparing spectroscopic data to the results of advanced electronic structure calculations. We demonstrate the epitaxial growth of EuN films, and show that in contrast to other rare-earth nitrides successful growth of EuN requires an activated nitrogen source.

2016年3月17日 · The Electron Energy-Loss Spectroscopy (EELS) and X-ray Absorption Spectroscopy (XAS) database has been completely rewritten, with an improved design, user interface and a number of new tools. The database is accessible at this https URL and can now be used without registration.

2014年1月1日 · In this work, we have studied the Eu oxidation state in Eu-doped CsSrI 3 scintillators by XAS at the Eu M 4,5 absorption edges and compared them to Eu in model compounds. We have also studied the effect of the hygroscopic nature of halides on Eu oxidation by characterizing aged samples and by exposing samples intentionally to an oxidizing ...

2021年6月11日 · Here, we report the development of a database of computed L-edge XANES using the multiple scattering theory-based FEFF9 code. The initial release of the database contains more than 140,000 L-edge...

如下图所示，xas原始数据可以分为近边xanes和扩展边exafs两部分。 近边对电子价态比较敏感，而扩展边通过数据处理和拟合可以获得丰富的结构信息。

We combined X-ray absorption fine structure and photoluminescence measurements to analyze the structure of europium centers in (Ca,Eu) 2 SiS 4 luminescent powders. This paper provides an explanation for the concentration dependency of the emission spectra.