Negative Ion Resonance of Molecules on Surfaces: From Spectroscopy to Dynamics

  • Lidija Šiller
  • Richard E. Palmer
Part of the Physics of Atoms and Molecules book series (PAMO)

Summary

In this article we have reviewed a number of examples of our recent research in the field of negative ion resonance phenomena at surfaces,with emphasis in the fundamental aspects of the work.

The studies of resonance scattering by physisorbed O2 on Ag (110)demonstrate the role of molecular alignment on the surface and the role of theory in understanding the changes in resonance character compared with the gas phase.The investigations of a more complex system,the coadsorption of K and O2 on the graphite surface,demonstrates the utility of resonance electron scattering in solving real surface problems.In this case, resonance scattering obtained not just from physisorbed O2 but also from a chemisorbed O2 species.A new mechanism for surface dynamics,i.e.surface electron attachment to a photoexcited molecule (the Rydberg state)is proposed in the case of photo desorption of negative ions from CO and O2 monolayers on graphite.Finally,a new kind of measurements,of the “depletion” of the vibrational modes of CH3Cl condensed on the graphite surface,provides possibly the first direct evidence of the dissociation of a molecular negative ion state into two neutral fragments.

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Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Lidija Šiller
    • 1
  • Richard E. Palmer
    • 1
  1. 1.Nanoscale Physics Research Laboratory, School of Physics and AstronomyThe University of BirminghamBirminghamUK

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