The unimolecular dissociation of HCO. V. Mixings between resonance states

The unimolecular dissociation of HCO in its ground electronic state is cons idered. By performing calculations (filter diagonalization, absorbing poten tial) for nonzero angular momentum quantum numbers, it is demonstrated how mixings with near-by "background" states affect the linewidths of the narro wer resonance states. This explains qualitatively the theoretically as well as experimentally observed behavior of the linewidth as a function of the vibrational quantum numbers. (C) 2001 American Institute of Physics.