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 ...

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)。

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.

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17日 · Relationship between the local structures of middle lanthanoid elements (Ln; Eu, Gd, Tb, and Dy) in their complex oxides and the characteristic features of the L 1 -edge and L 3 -edge X-ray absorption near edge structure (XANES) was investigated.

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.

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...

The objective of this XAS project is to probe the surface structure of sorbed contaminants on different synthetic oxides that resemble the oxide layers observed from the steel

XAS（synchrotron X-ray absorption spectroscopy）以X射线光子能量作为变量，测定材料的X射线吸收系数。 每个吸收边与材料中存在的特定原子有关，更具体地说，与将特定原子核轨道电子激发到自由或未占据的连续谱水平（轨道的电离）的量子力学转变有关。