Effect of the molecular structure on the gas-surface scattering studied by supersonic molecular beam
Effect of the molecular structure on the gas-surface scattering studied by supersonic molecular beam
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DOI：
10.1140/epjd/e2005-00284-4
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发表时间：
2006-04-01
影响因子：
1.8
通讯作者：
Kawai, M
中科院分区：
文献类型：
--
作者：
Kondo, T;Kato, HS;Kawai, M
研制了一套研究气体-表面相互作用的实验装置。通过测量He束的飞行时间和He从LiF（001）散射的角强度分布，确定了装置中He束的相干长度、能量分辨率和角展度分别为Ω = 16 nm、Δ E/E = 2.4%和Δ θ = 0.5 °。测量了Ar、N-2和CO从LiF（001）表面沿[100]方位沿着方向散射的角强度分布随入射平移能的变化。本文讨论了分子结构各向异性和质心位置对波纹表面上气体-表面非弹性碰撞的影响，并基于最近发展起来的简单经典椭球-搓衣板模型理论进行了预测。
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 omega= 16 nm, Delta E/E = 2.4% and Delta theta = 0.5 degrees, 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, N-2 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.