The interaction of small molecules with Pd and K covered Pd surfaces at energies from 200 keV to 6 keV

Autor(en): Schlatholter, T
Franke, H
Vicanek, M
Heiland, W
Stichwörter: Chemistry; Chemistry, Physical; DISSOCIATION; H2+; HYDROGEN; IMPURITIES; ion-solid interactions; IONS; low energy ion scattering (LEIS); low index single crystal surfaces; palladium; Physics; Physics, Condensed Matter; SCATTERING; SIMPLE METALS
Erscheinungsdatum: 1996
Herausgeber: ELSEVIER SCIENCE BV
Journal: SURFACE SCIENCE
Volumen: 363
Ausgabe: 1-3
Startseite: 79
Seitenende: 84
Zusammenfassung: 
In the energy range of 200 eV to a few keV small molecules are scattered al grazing incidence from Pd(110) and Pd(110) covered with a monolayer of K. The experimental setup provides ions and neutrals as primary particles and the time-of-flight analysis of the scattered particles includes both ions and neutrals. Depending on energy and K coverage, dissociation and scattering of the molecules is found. At low energies and one monolayer K the survival of H-2 is very high and decreases with increasing kinetic energy. At the clean surface the dissociation is high and increases with increasing energy. The data analysis shows that at low energies electronic processes are most important for the fate of the molecules, whether they are neutrals or ions. With increasing kinetic energy, vibrational and rotational excitations of the molecules contribute increasingly to dissociation. Classical trajectories calculations reveal interesting details of these processes.
Beschreibung: 
International Symposium on Dynamical Quantum Processes on Solid Surfaces, TOYONAKA, JAPAN, SEP 20-25, 1995
ISSN: 00396028
DOI: 10.1016/0039-6028(96)00113-6

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