Abstract
Stimulated-emission pumping is successfully applied to the study of unimolecular dissociation dynamics of HFCO → HF + CO in a pulsed jet. Dissociative levels of the ground electronic state are prepared by stimulated-emission pumping, and the CO fragments formed from these levels are probed by vacuum-ultraviolet laser-induced fluorescence spectroscopy. The rotational energy distribution of the CO fragments indicates modest differences between the dissociation dynamics of HFCO and those of H2CO. However, the Doppler width of CO fragments from HFCO indicates that the total kinetic energy of the fragments from HFCO is ~65% of total available energy, the same fraction as in the dissociation of H2CO. The linewidths of the dissociative levels are also measured with high-resolution fluorescence-dip-detected stimulated-emission pumping spectroscopy.
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