How do hydrogen atoms on surfaces affect the trajectories of heavier scattered atoms?

Citation
Km. Lui et al., How do hydrogen atoms on surfaces affect the trajectories of heavier scattered atoms?, J CHEM PHYS, 111(24), 1999, pp. 11095-11100
Citations number
31
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF CHEMICAL PHYSICS
ISSN journal
0021-9606 → ACNP
Volume
111
Issue
24
Year of publication
1999
Pages
11095 - 11100
Database
ISI
SICI code
0021-9606(199912)111:24<11095:HDHAOS>2.0.ZU;2-H
Abstract
The recently developed technique of scattering and recoiling imaging spectr ometry (SARIS) is used to probe the effect of hydrogen atoms on the traject ories of 5 keV Ne+ scattering from a Pt(111) surface. Classical kinematic c alculations and ion trajectory simulations, using the scattering and recoil ing imaging code (SARIC), are carried out in order to probe the details of the interaction and the nature of the perturbation. It is demonstrated that adsorbed hydrogen atoms are capable of deflecting these low kilo-electron- volt Ne trajectories scattering from a Pt surface. These perturbations resu lt in spatial shifts and broadenings of the anisotropic features of the SAR IS images that are readily detectable. The scattered Ne atoms lose 0-18% of their initial kinetic energy as a result of the perturbation by the H atom s. The physics of the perturbation on the trajectories can be understood fr om straightforward classical kinematic calculations and SARIC ion trajector y simulations. (C) 1999 American Institute of Physics. [S0021-9606(99)71148 -7].