Physisorbed O-2 on Ag(111) at mono- and multilayer coverages was studied by high-resolution electron energy-loss spectroscopy. As the excitation mechanism, the (4) Sigma(u)(-) negative-ion resonance was chosen. The O-2 stretch mode and its overtones exhibit a strong rail to higher loss energies. For the multilayer, a broad peak around 7 meV is observed. This observation and the lack of any larger intensity on the gain side made it likely that vibrational energy quanta as large as 7 meV are the dominant contribution to the tail.
Resonant electron scattering of physisorbed O2 on Ag(111)
ROCCA, MARIO AGOSTINO;
1996-01-01
Abstract
Physisorbed O-2 on Ag(111) at mono- and multilayer coverages was studied by high-resolution electron energy-loss spectroscopy. As the excitation mechanism, the (4) Sigma(u)(-) negative-ion resonance was chosen. The O-2 stretch mode and its overtones exhibit a strong rail to higher loss energies. For the multilayer, a broad peak around 7 meV is observed. This observation and the lack of any larger intensity on the gain side made it likely that vibrational energy quanta as large as 7 meV are the dominant contribution to the tail.File in questo prodotto:
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