Metastable resonances on the ground electronic state of the HCO radical have
     been prepared by stimulated emission pumping.  The resonances have energies
     5000 to 10,000 cm-1 above the dissociation limit of HCO and can be assigned
     by their vibrational and asymmetric-top rotational character.  The transition
     linewidths of the resonances and the rotational and vibrational distributions
     of the CO dissociation products have been measured.  The linewidths show a
     strong dependence on the vibrational character of the resonance rather than
     a monotonic dependence on energy, and thus provide an important example of
     non-statistical behavior.  CO(v=2) was produced in the decay of all six
     resonances studied, while only the three highest energy resonances produced
     measurable amounts of CO(v=3).  CO rotational distributions with population
     in low-J states, which often showed non-statistical structure, were
     characteristic of the products from all the resonances studied.  The rotational
     distributions depend both on the vibrational character of the parent state and
     on the rotational state prepared in the HCO.  The experimental results are
     compared and contrasted with previous quantum mechanical calculations and
     analyzed in the context of a modified Franck-Condon model for the
     dissociation.