Helium atom scattering from isolated CO molecules on a Pt(111) surface: Experiment versus close-coupling calculations for a realistic He-CO potential

Authors
Choi, BH Graham, AP Tang, KT Toennies, JP
Citation
Bh. Choi et al., Helium atom scattering from isolated CO molecules on a Pt(111) surface: Experiment versus close-coupling calculations for a realistic He-CO potential, J CHEM PHYS, 112(23), 2000, pp. 10538-10547
Citations number
39
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF CHEMICAL PHYSICS
ISSN journal
00219606 → ACNP
Volume
112
Issue
23
Year of publication
2000
Pages
10538 - 10547
Database
ISI
SICI code
0021-9606(20000615)112:23<10538:HASFIC>2.0.ZU;2-Q
Abstract
The angular dependence of the elastic scattering of helium atoms from a low coverage (Theta(CO) = 0.03) of randomly distributed isolated CO molecules adsorbed on a Pt(111) surface has been measured over a wide range of incide nt helium atom beam energies between E-i=5.25 and 62.1 meV. The results are compared with a close-coupling theory for a realistic He-CO potential. Fro m a best fit of the experimental results the distance of the molecule from the surface and a modified gas phase He-CO potential are obtained. (C) 2000 American Institute of Physics. [S0021-9606(00)01821-3].