Preparation of actinide thin film deposits for nuclear physics and solid state physics researches

✍ Scribed by J. Kwinta; P.H. Brossard; J.J. Michel; J. Thoreux

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 237 KB
• Volume: 94
• Category: Article
• ISSN: 0020-1693
• DOI: 10.1016/s0020-1693(00)94585-7

✦ Synopsis

largely exceed a surface process and can be ascribed to a hydroxycarbonate phase. In addition, curve (i) of Fig. 2 shows the XPS spectra of Ybz03 aged for 4 years in air. As can be observed, the ratio of hydroxyl signal intensity to the one of the oxide clearly shows that most of the oxygens within the photoelectron escape depth are in the form of OH-group.

Although the mechanistic aspects of the slow hydration and carbonation of the heavier Ln?Os are out of the scope of this article, the poisoning effect of CO* can be easily understood:

CO* competes with Hz0 for the basic centres necessary for dissociative adsorption. This fact, together with the strongly basic properties of the carbonate and bicarbonate surface species formed on COz adsorption, can hinder the proton mobility.