Reinhard Schinke

Max-Planck-Institut fur Stroemungsforschung, Goettingen, GERMANY

The vibrational spectra of triatomic molecules will be discussed from the perspective of exact quantum mechanical calculations using accurate and global potential energy surfaces. The examples include HCP, DCP, and HOCl. In all these examples anharmonic resonances between two modes play an essential role. At high energies these resonances lead to bifurcations in the classical phase space, which leave profound hallmarks in the quantum mechanical spectra. For HCP, the theoretical predictions can be directly
compared with detailed experimental results and very good overall agreement is obtained.