Influence of vibrational resonances and Coriolis coupling on dissociation rates in the near-threshold unimolecular fragmentation of HOCl

The unimolecular dissociation of HOCl in the ground electronic state near t he HO+Cl fragmentation threshold is investigated employing an ab initio pot ential energy surface. The dynamics calculations are performed by using an imaginary absorbing potential and filter diagonalization. The computational study is mainly focused on the influence of accidental or systematic vibra tional resonances on the total angular momentum dependence of dissociation rates and the importance of Coriolis interaction.