Local electron distribution of N2 adsorbed on a Ni(111) surface probed by metastable impact electron spectroscopy

Electron emission spectra resulting from thermal collisions of He*(23S) metastable atoms with N2 on a Ni(111) surface in the physisorbed, chemisorbed, and condensed phases were measured as well as the gas-phase spectrum. The ionization cross sections for the 3σg-, 1πu-, and 2σu-derived states depend...

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Bibliographic Details
Published in:The Journal of chemical physics 2000-09, Vol.113 (9), p.3864-3867
Main Authors: Masuda, Shigeru, Suzuki, Ryochi, Aoki, Masaru
Format: Article
Language:English
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Summary:Electron emission spectra resulting from thermal collisions of He*(23S) metastable atoms with N2 on a Ni(111) surface in the physisorbed, chemisorbed, and condensed phases were measured as well as the gas-phase spectrum. The ionization cross sections for the 3σg-, 1πu-, and 2σu-derived states depend on the orientation of N2 with respect to the metastable beam, reflecting the spatial electron distribution. Our data also show that upon chemisorption the 3σg- and 2σu-derived states are modified by mixing with each other to yield a strong charge localization. This finding indicates that, even if the metal contribution is small in the chemisorbed states, it plays a crucial role in the topology of the adsorbate wave functions.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.1287717