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Journal Article

Physisorption of CO and N2 on Al(111): Observation of surface-molecule vibrations in electron resonance scattering

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Jacobi,  Karl
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Bertolo,  M.
Fritz Haber Institute, Max Planck Society;

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Citation

Jacobi, K., & Bertolo, M. (1990). Physisorption of CO and N2 on Al(111): Observation of surface-molecule vibrations in electron resonance scattering. Physical Review B, 42(6), 3733-3736. doi:10.1103/PhysRevB.42.3733.


Cite as: https://hdl.handle.net/21.11116/0000-0008-3CBA-4
Abstract
Monolayers of physisorbed CO and N2 on Al(111) were investigated by means of high-resolution electron-energy-loss spectroscopy (HREELS). The line shapes of the ν=0→1 molecular stretching modes differ largely. In the high-energy-loss tail of this mode, surface-molecule stretching losses are detected with an energy of 10.5 meV in the case of N2. It is demonstrated that this large inelastic intensity is due to the negative-ion resonance scattering mode operating for N2 but not for CO. The results are discussed in the framework of Gadzuk’s wave-packet method for time-dependent quantum behavior of molecules on surfaces.