Model studies for rovibronic IVR with applications to benzene

W. Dietz, S. F. Fischer

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Intramolecular vibrational energy redistribution (IVR) is treated. Nearly isoenergetic rigid-rotor harmonic-oscillator states are rovibronically coupled by the interplay of enharmonic and Coriolis forces. The theory predicts linewidth distributions of rovibronic states and explains the selective supression of rotational spectral lines. Applications to sub-Doppler spectra of the 1401 102 band of benzene allow to extract values for effective intramolecular interactions. These results are supported by direct calculations based on the force field.

Original languageEnglish
Pages (from-to)249-259
Number of pages11
JournalJournal of Chemical Physics
Issue number1
StatePublished - 1987


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