DECAY CHANNELS OF RESONANT AND CONTINUUM CORE EXCITATIONS IN CONDENSED ETHYLENE AND CYCLOHEXANE

We present Auger decay data obtained after resonant and off-resonant e xcitation of core holes at the carbon K edge for condensed ethylene an d cyclohexane. Whereas ethylene shows a strong bound resonance below t he vacuum level corresponding to the antibonding 1b3g orbital, the low est resonance for cyclohexane is of mixed valence/Rydberg type. The di fference in spatial localization of these two adsorption resonances gi ves rise to very different resonant decay spectra. Whereas for ethylen e strong participant channels are observed, those channels are much we aker for cyclohexane. Correspondingly, the observed spectator shifts a re different for the two molecules.