Intramolecular vibrational dynamical barrier due to extremely irrational couplings

Shu Ching Ou, Guo Zhen Wu

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The intramolecular vibrational dynamics due to extremely irrational couplings is demonstrated by contrast to the resonance couplings, for the three-mode case of H2O as an example. The extremely irrational couplings are shown to impose such strong hindrance to intramolecular vibrational relaxation (IVR) that they act as barriers. They restrict the direct action/energy transfer between the two stretching modes, though they allow the transfer between a stretching and a bending modes. In contrast, the resonance is more mediated by the bending mode and leads to chaotic IVR. It is also shown that there is a region in the dynamical space in which resonance and extremely irrational couplings coexist.

Original languageEnglish (US)
Pages (from-to)2952-2956
Number of pages5
JournalChinese Physics
Issue number10
StatePublished - Oct 1 2007


  • Extremely irrational couplings
  • Intramolecular vibrational relaxation
  • Resonance

ASJC Scopus subject areas

  • General Physics and Astronomy


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