Effect of the molecular structure on the gas-surface scattering
studied by supersonic molecular beam |
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Authors: | T Kondo H S Kato T Yamada S Yamamoto M Kawai |
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Institution: | 1. Surface Chemistry Laboratory, RIKEN (Institute of Chemical and Physical Research), 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan 2. National Institute of Advanced Industrial Science and Technology (AIST) AIST Tsukuba Central 2, 1-1-1 Umezono, Tsukuba, 305-8568, Japan 3. Department of Advanced Materials Science, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa, Chiba, 277-8561, Japan
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Abstract: | The experimental apparatus for investigating the gas-surface interaction has
been newly developed. The coherent length of the helium, the energy
resolution and the angular spread of the beam in the apparatus were
established as ω= 16 nm,
DE/E = 2.4%\Delta E/E = 2.4{\%}
and Δθ= 0.5○, respectively, through the
measurements of the time-of-flight of He beam and of the angular intensity
distributions of He scattered from LiF(001). The angular intensity
distributions of Ar, N2 and CO scattered from the LiF(001) surface
along the 100] azimuthal direction were then measured as a function of
incident translational energy. The effects of the molecular structural
anisotropy and center-of-mass position on the gas-surface inelastic
collision at the corrugated surface are discussed with predictions based on
a recently developed simple classical theory of the ellipsoid-washboard
model. |
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Keywords: | |
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