Abstract
We investigate the dynamics and site-selectivity in the dissociation of transient anions formed upon attachment of low energy electrons to acetic acid by anion fragment momentum imaging experiments. The resonances at 6.7 and 7.7eV are confirmed to dissociate exclusively by the O-H bond, while a third resonance at 9.1eV dissociates primarily by both C-H break and O-H break. A fourth resonance near 10eV is found to dissociate by O-H break. For each resonance, the measured kinetic energy release indicates two-body dissociation produces a neutral radical in the ground electronic state, for all four resonances. The measured angular distributions are consistent with all four resonances having A' symmetry.
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