The reflection anisotropy (RA) spectra from clean Ni(110), Na/Ni(110)(1 x 2), and CO/Ni(110) surfaces were measured between 1.5eV and 4.0eV. Electronic transitions involving exchange-split d bands to an unoccupied surface state contribute a broad structure to the RA profile of Ni(110). The Na-induced surface reconstruction gives rise to a change in the RA profile that was related to changes in the unoccupied surface state. RA spectroscopy was found to be sensitive to the exposure of Ni(110) to CO.

Reflection Anisotropy Spectroscopy of Clean and Adsorbate-Covered Ni(110) Surfaces. D.S.Martin, S.D.Barrett, P.Weightman: Journal of Physics - Condensed Matter, 2001, 13[44], 9847-55