物理化学学报2017，Vol.33Issue(2)：364-369,6.DOI:10.3866/PKU.WHXB201611082
EXELFS对二氧化铀晶格结构的分析
EXELFS Analysis of Lattice Structure of Uranium Dioxide
摘要
Abstract
The present work demonstrates that extended energy loss fine structure (EXELFS) analysis can be used to investigate the microstructure of Uranium dioxide.First,EXELFS was extracted by IFEFFIT package from oxygen-K edge in electron energy-loss spectrometry (EELS) spectrum of UO2.Next,the EXELFS was Fourier transformed to obtain the experimental real-space spectrum,which was then back-Fourier transformed to obtain the experimental reciprocal-space spectrum.In the next step,the two experimental spectra were fitted with the IFEFFIT package to obtain information about the local structure of the oxygen atoms.Finally,the lattice constant of UO2 determined by EXELFS analysis was found to be merely 1.4％ lower than that experimentally obtained by X-ray diffraction (XRD).This result confirms that EXELFS analysis is a feasible method of investigating UO2 microstructural information.关键词
锕系元素/铀氧化物/电子能量损失谱/广延能量损失精细结构/径向结构函数Key words
Actinide element/Uranium oxide/Electron energy-loss spectrometry/Extended energy loss fine structure/Radial structural function分类
化学化工引用本文复制引用
蒋奥克,刘柯钊,赵雅文,龙重,张雷,胡殷,曾荣光,张延志,肖红,朱康伟..EXELFS对二氧化铀晶格结构的分析[J].物理化学学报,2017,33(2):364-369,6.基金项目
The project was supported by the National Natural Science Foundation of China (11404295,11404296,11305148).国家自然科学基金(11404295,11404296,11305148)资助项目 （11404295,11404296,11305148）
