Additional bands of the Ar-D2O intramolecular bending mode observed using a quantum cascade laser

Jacob T. Stewart, Benjamin J. McCall

Research output: Contribution to journalArticlepeer-review


Three new rovibrational bands of Ar-D2O have been observed in the ν2 bending region of D2O using a quantum cascade laser based cavity ringdown spectrometer. In addition, further observations of the Π(110, ν2 = 1) ← Σ(101) band reported by Li et al. (J. Mol. Spectrosc. 272 (2012) 27-31) have been made. All bands were fit by treating the complex using a pseudo-diatomic model which treats the D2O as a free rotor within the complex. Molecular constants have been obtained using this model and are reported with deviations in the fits ranging from 0.0002 cm-1 to 0.0005 cm-1. Two of the newly observed bands are tentatively assigned as the Π(202, ν2 = 1) ← Σ(111) and Π(211, ν2 = 1) ← Σ(202) bands, which have not previously been observed in other spectral regions.

Original languageEnglish (US)
Pages (from-to)34-38
Number of pages5
JournalJournal of Molecular Spectroscopy
Issue number1
StatePublished - Dec 18 2012


  • Quantum cascade laser
  • Van der Waals complex
  • Water clusters

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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