Abstract
Spectral patterns are investigated in a model of an isomerizing coupled stretch-and-bend system that is intended to have some of the features of a realistic model of the acetylene−vinylidene isomerization. There are patterns of a dip or minimum in the spacing of neighboring energy levels, which is characteristic of the barrier, the multiple minima, and above-barrier motion. The patterns are obtained by classifying sequences in terms of approximate effective quantum numbers, which are determined using a diabatic correlation diagram technique. The patterns have anomalies that carry dynamical information that is associated with nonlinear resonance-type couplings, similar to anharmonic Fermi resonances, between the stretch and the bend. There is conventional Fermi resonance below the barrier, and a new type of “cross-barrier” resonance is observed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
