THEORETICAL-STUDIES OF THE REACTIVITY AND SPECTROSCOPY OF H+CO REVERSIBLE HCO .1. STABILIZATION AND SCATTERING STUDIES OF RESONANCES FOR J=0 ON THE HARDING ABINITIO SURFACE

We report stabilization and coupled-channel scattering calculations of isolated resonances for a triatomic molecule HCO using a global, ab initio potential energy surface. The lowest nine resonances are identified for total angular momentum J = 0. The two set of calculations agree closely with each other on the resonance locations which are then compared to experimentally determined locations. These resonances show widths varying 10(-6) to 10(0) cm-1. Pictures of resonance wave functions are presented for the proper assignment of quantum numbers of resonance states. A simple technique for locating very narrow resonances in scattering calculations is presented and a worked example shows large savings of computational efforts for scattering calculations. Partial widths and resonance lifetimes are obtained by analysis of the S matrices. Final state distribution probabilities are presented for resonance and direct scattering and the characteristics of this scattering are discussed.