A study of relative energy losses of channelled protons in a tungsten single crystal

• Book ID: 104264599
• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 160 KB
• Volume: 28
• Category: Article
• ISSN: 0042-207X
• DOI: 10.1016/s0042-207x(78)80311-x

✦ Synopsis

investigation of the surface diffusion of oxygen on W(110). The vibrating electrode consists of a wire of 6 pm diameter which can be moved across the surface at a distance of 15 pm. The local work function profile is converted to the corresponding concentration profile by a calibration curve obtained by Auger spectroscopy. The evaluation achieved by the Boltzmann-Matano analysis yields a concentration dependent diffusion coefficient with an activation energy of 27 f 2 kcal. The concentration dependence can qualitatively be explained by the known adsorption properties of this adsorbate-substrate system.