【摘要】 采用X射线光电子能谱 (XPS)分析研究了多晶贫铀的清洁表面在 2 98K时与CO的原位反应过程。初始反应各阶段U4f,O1s和C1s芯能级谱的变化和定量分析表明 ,CO在金属铀表面吸附解离 ,解离出的原子氧和原子碳分别与金属铀形成氧化物和碳化物 ,碳原子比氧原子向基体扩散得更深。实验过程中未发现CO分子吸附在金属铀表面的证据。更多还原

【Abstract】 The reactivity of polycrystalline depleted uranium with carbon monoxide was investigated by X ray photoelectron spectroscopy(XPS) at 298K. The changes of U4f, O1s and C1s core level spectra in initial oxidation stages suggest that carbon monoxide adsorption on clean uranium surface leads to the formation of carbide and oxide. A small amount of free carbon and O 2- /O - also exists on the uranium surface. Quantitative analysis indicates that carbon atoms locate deeper in the bulk of the uranium metal than the oxygen atoms.更多还原