H. Tillborg et al., SHAKE-UP AND SHAKE-OFF STRUCTURES IN CORE-LEVEL PHOTOEMISSION SPECTRAFROM ADSORBATES, Journal of electron spectroscopy and related phenomena, 62(1-2), 1993, pp. 73-93
Previous studies of the satellites in adsorbate core level spectra are
reviewed. New or recently published high resolution X-ray photoemissi
on spectra are presented. The results represent systems which cover a
range of different adsorption bond strengths, from physisorption (O2/g
raphite) and weak chemisorption (CO/Cu(100), N2/Ni(100)) to strong che
misorption (CO/Ni(100)). The shake-up spectra reveal some new details,
and are discussed in the light of previous models and interpretations
. By extended shake-up/shake-off measurements, it is shown that the re
lative spectral weight of the main line in many cases is lower than pr
eviously suggested. The shake-up structures are discussed in terms of
valence excitations in the substrate-adsorbate complex, and the role o
f the core hole is stressed.