Abstract
Dirhenium decacarbonyl was photolyzed in the gas phase by excimer laser radiation at 308 nm. The products of the photolysis were probed by the time-resolved UV/VIS emission on the nanosecond time scale. Only the emission from the excited rhenium atoms was observed. The Re(a 6D sol9 2 ) state was identified as a photoproduct. From the quadratic dependence of the emission signal it follows that a sequential mechanism of the photolysis takes place and an effective saturation occurs in the fluency range 25–170 mJ cm t-1. A significant quenching of the Re(z 6P o j )states was found. The collisional deexcitation of an excited Re(CO) or Re 2 species can be responsible for the quenching. The atomic resonance contributes to the population of excited states above the one-photon energy.
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