Novel geminate recombination channel after indirect photoionization of water |
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Authors: | Fischer Martin K Rossmadl Hubert Iglev Hristo |
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Affiliation: | Physik-Department E 11, Technische Universita?t Mu?nchen, D-85748 Garching, Germany. |
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Abstract: | We studied the photolysis of neat protonated and heavy water using pump-probe and pump-repump-probe spectroscopy. A novel recombination channel is reported leading to ultrafast quenching (0.7 ± 0.1 ps) of almost one third of the initial number of photo-generated electrons. The efficiency and the recombination rate of this channel are lower in heavy water, 27 ± 5% and (0.9 ± 0.1 ps)(-1), respectively. Comparison with similar data measured after photodetachment of aqueous hydroxide provides evidence for the formation of short-lived OH:e(-) (OD:e(-)) pairs after indirect photoionization of water at 9.2 eV. |
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