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

被引:13
|
作者
Choi, BH
Graham, AP
Tang, KT
Toennies, JP
机构
[1] Max Planck Inst Stromungsforsch, D-37073 Gottingen, Germany
[2] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA
[3] Pacific Lutheran Univ, Dept Phys, Tacoma, WA 98447 USA
来源
JOURNAL OF CHEMICAL PHYSICS | 2000年 / 112卷 / 23期
关键词
D O I
10.1063/1.481687
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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 incident 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. From 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].
引用
收藏
页码:10538 / 10547
页数:10
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