U.V. photoelectron spectroscopy of OH and OD radicals

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Abstract
Valence ionization energies of the short-lived radicals OH and OD formed in the gas phase reaction between fluorine atoms and (deuterated) water are presented. The essential role of a new modulation method, used in combination with discharge-triggering, lock and multiscan techniques, in ultraviolet photoelectron spectroscopy of transient species generated by atom-molecule reactions is illustrated. Results are in excellent agreement with data from optical emission spectroscopy which have either been obtained experimentally or have been inferred from spectral perturbations. As secondary reaction products, the unstable molecules HOF and DOF are detected.

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