Origin of H− in collisions of hydrogen atoms with an adsorbate-covered Cu(100) surface

Autor:	J. N. DeFazio, B. L. Peko
Rok vydání:	2004
Předmět:	Ion beam Hydrogen Band gap Chemistry Electron capture chemistry.chemical_element Surfaces and Interfaces Condensed Matter Physics Surfaces Coatings and Films Ion Crystal Metal Adsorption visual_art visual_art.visual_art_medium Atomic physics
Zdroj:	Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 22:2251-2255
ISSN:	1520-8559 0734-2101
DOI:	10.1116/1.1795821
Popis:	Results are presented from an experimental study of electron capture and loss during collisions of low-energy hydrogen atoms and ions with a residual gas covered metal surface. Ground-state hydrogen atoms (H1s) and the atomic ions (H−,H+) were scattered from a Cu(100) surface with energies ranging from 25to200eV. Energy loss analysis indicates that the dominant process leading to H− formation proceeds directly through the adsorbed vacuum species, with the metallic crystal acting primarily as a physical scattering platform. In addition, ion beam experiments reveal effects due to the charge state of the incident particle that are inconsistent with the results expected for clean metal surfaces. Measurements indicate that the neutralization of incident ions as expected for clean metals is suppressed, a feature that is attributed to the band gap and dielectric strength of the adsorbed layer.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::06cddecd4c2921ff124468bb7ec2bcd8 https://doi.org/10.1116/1.1795821 Zobrazit plný text záznamu