| Alternative title | Infrared spectra of N2O-4He, N2O-3He, and OCS-3He complexes |
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| DOI | Resolve DOI: https://doi.org/10.1063/1.1493191 |
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| Author | Search for: Tang, Jian1; Search for: McKellar, A. R. W.1 |
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| Affiliation | - National Research Council of Canada. NRC Steacie Institute for Molecular Sciences
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| Format | Text, Article |
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| Abstract | Infrared spectra of the weakly bound complexes N₂O-⁴He, N₂O-³He, and OCS-³He have been observed using a tunable diode laser to probe a pulsed supersonic jet expansion. The rotational structure of the bands was analyzed using a conventional asymmetric rotor Hamiltonian. The N₂O-³He and OCS-³He spectra are mostly a type (ΔKa=0) in structure, with very weak b-type (ΔKa = ±I ) transitions, but for N₂O-⁴He the a- and b-type components are both prominent. The fitted rotational parameters are consistent with roughly T-shaped structures with intermolecular separations around 3.4-3.5 Å for N₂O-He and 3.8-3.9 Å for OCS-He. The angle between the N₂O or OCS axis and the He position is about 80° for N₂O-He and 65° for OCS-He. The vibrational band origins are slightly blueshifted from those of the free molecule, with the N₂O-He shifts (+0.2 cm⁻¹) being about twice the magnitude of the OCS-He shifts (+0.1 cm⁻¹). The results are of particular interest since N₂O and (especially) OCS have both been used as probes in experiments on ultracold helium nanodroplets. |
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| Publication date | 2002-07-24 |
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| Publisher | American Institute of Physics |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 12330218 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 23a86bb1-2a80-40cd-8757-2cdc90a8bd59 |
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| Record created | 2009-09-10 |
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| Record modified | 2020-03-30 |
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