Understanding the high-resolution spectral signatures of Ar-D2O in the 3OD stretch region measured by cavity ringdown absorption spectroscopy

Glorieux, Robin;Bogomolov, Alexandr;Herman, M.;Moazzen-Ahmadi, N.;Lauzin, Clément;et.al.
(2026) Molecular Physics : an international journal at the interface between chemistry and physics — p. e2625418 (2026)

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Authors
  • Glorieux, RobinUCLouvain
    Author
  • Bogomolov, Alexandrorcid-logoUCLouvain
    Author
  • Herman, M.Université libre de Bruxelles
    Author
  • Moazzen-Ahmadi, N.University of Calgary
    Author
  • Lauzin, Clémentorcid-logoUCLouvain
    Author
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Abstract
We report observation of the weakly-bound Ar-D2O complex in the 3OD overtone stretch region (7900 cm-1). The measurement was made using the FANTASIO cavity ring-down spectrometer (CRDS) combined with a 8 cm long pulsed slit nozzle valve. Several sub-bands are assigned. At 7892 cm-1, the Σ(000), (201) ← Σ(101), (000) band (para nuclear spin species) experiences a moderate (0.04 cm-1) perturbation between J = 6 and 7. At 7903 cm-1, the Σ(101), (201) ← Σ(000), (000) band (ortho nuclear spin species) exhibits a more complicated perturbation at about the same J-values. Most of the observed transitions (187) can be rotationally assigned. Finally, in the range 7913 – 7916 cm-1, the Π (101), (201) ← Σ(000), (000) and Π(110), (201) ← Σ(000), (000) bands (ortho nuclear spin species) are observed, and their rotational analysis remains tentative.
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Glorieux, R., Bogomolov, A., Herman, M., Moazzen-Ahmadi, N., Mckellar, A. R. W., & Lauzin, C. (2026). Understanding the high-resolution spectral signatures of Ar-D2O in the 3OD stretch region measured by cavity ringdown absorption spectroscopy. Molecular Physics : an international journal at the interface between chemistry and physics, e2625418. https://doi.org/10.1080/00268976.2026.2625418 (Original work published 2026)