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用角分辨偏振紫外光电子谱对CO与K在Fe(110)表面上共吸附进行了研究。CO与K共吸附的Hel紫外光电子谱与清洁表面上CO的结果相比,在结合能为6.3eV处出现了一个新的谱峰。偏振紫外光电子谱的分析表明:相关的初态有一对称面,此面平行于衬底〈001〉方向。Hell紫外光电子谱中,CO的4σ态(4α1)强度随入射角改变的结果表明CO依然近似于直立在有K覆盖的Fe表面上。A symmetry plane for K-CO coadsorbate at low coverage on Fe(1lO) surface was foundusing angle-resolved UPS with polarized light. This plane is parallel to the azimuth ofthe crystal surface. The dependence of the CO 4σ peak intensity on incidence angle was foundto be nearly the same as in the case without K, where the molecular axis of CO is perpendicular to the surface.
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中国物理学会期刊
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