Penning-Ionization Electron Spectroscopy of Chemisorbed CO
Penning-Ionization Electron Spectroscopy of Chemisorbed CO
复制标题
化学吸附 CO 的彭宁电离电子能谱
DOI：
10.1103/physrevlett.42.1082
复制
发表时间：
1979
期刊：
影响因子：
--
通讯作者：
H. Haberland
中科院分区：
文献类型：
--
作者：
H. Conrad;G. Ertl;J. Küppers;S. W. Wang;K. Gérard;H. Haberland
测量了亚稳态He 2 S1（激发能E 2 = 2 0.6eV）和2 S3（激发能E 2 = 19.8eV）原子撞击清洁和CO覆盖的Pd（111）表面时电子的能量分布。潘宁机制的运作，即，He*+ A→ He+ A++ e−，吸附CO的价轨道可以确定。从而建立了一种对最外层原子具有极高灵敏度的表面光谱新技术。
Energy distributions of electrons ejected from clean and CO-covered Pd (111) surfaces by impact with metastable He* 2 S 1 (excitation energy E*= 20.6 eV) and 2 S 3 (E*= 19.8 eV) atoms were measured. The operation of the Penning mechanism, viz., He*+ A→ He+ A++ e−, is demonstrated for adsorbed CO whose valence orbitals could be identified. Thereby a new surface spectroscopic technique with extreme sensitivity to the outmost atomic layer is established.