Helium scattering as a probe of the clean and adsorbate covered Pt(111) surface

摘要: Abstract Thermal energy (16–165 meV) helium nozzle beam scattering has been used as a probe of the physical structure nominal Pt(111) surface and for consequential effects adsorption gases including CO, H 2 , O C . By careful crystal alignment polishing techniques with terrace widths greater than 3000 A was achieved judged by scattering. The profile scattered peak immeasurably affected presence various adsorbates while intensity decreases monotonically coverage. sensitivity to is, in general, function angle incidence beam. cross-section adsorbate can be, some cases, much larger its Van der Waals diameter apparently increases degree perfection surface.