✦ LIBER ✦

Vibrational and rotational modes of physisorbed H2 and N2 on Ag(111) surfaces

✍ Scribed by M. Gruyters; K. Jacobi

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 507 KB
Volume: 225
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(94)87086-1

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✦ Synopsis

H2 and N2 physisorbed on a Ag( 111) surface are investigated by means of high-resolution electron-energy loss spectroscopy with an energy resolution of 3 meV. The incident electron energy is tuned to negative ion resonances at 3 eV for Hz and 1.5 eV for N,, and high probability for inelastic electron scattering due to combined vibrational and rotational modes is observed. The external HI-surface (out-of-plane) vibration and its overtones are found at 8.55, 14.8 and 19.0 meV, well separated from the rotational modes. For Nz, anticipated external rotational and translational modes overlap and give rise to structureless inelastic tails of the N2 stretching vibration and its overtones.

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