Abstract
Selectively excited photoluminescence spectra of Ar clusters are presented. They contain information concerning fragmentation of the clusters following primary exciton-type excitation. Excited Ar 2 ∗ molecules are identified as the main excited fragments. Close similarities between desorption of excited species from solid Ar and fragmentation of Ar clusters are found. Lifetime measurements of the wavelength-selected cluster luminescence bands indicate cluster-specific properties of the cluster luminescence center. It turns out that time- and spectrally resolved luminescence spectroscopy under selective photon excitation is a powerful tool to investigate electronic cluster excitation.
Published Version
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