Publication Abstracts

Ozanne et al. 1997

Ozanne, L., Q. Ma, Nguyen-Van-Thanh, C. Brodbeck, J.P. Bouanich, J.M. Hartmann, C. Boulet, and R.H. Tipping, 1997: Line-mixing, finite duration of collision, vibrational shift, and non-linear density in the ν3 and 3ν3 bands of CO2 perturbed by Ar up to 1000 bar. J. Quant. Spectrosc. Radiat. Transfer, 58, 261-277, doi:10.1016/S0022-4073(97)00007-1.

We present high-density experimental and theoretical results on CO2-Ar gas-phase absoprtion in the ν3 and 3ν3 infrared bands. Measurements have been made at room temperature for pressures up to 1000 bar in bothe the central and wing regions of the bands. A non-linear perturber density dependence of the absorption, clearly shown in the far wing, is attributed to the finite volume of the molecules. Furthermore, experiments show vibrational dephasing and narrowing effects. We have performed line-mixing computations based on the Energy Corrected Sudden approximation (ECS impact model). Significant discrepancies between experimental and calculated spectra appear when pressure increases. We then tested the influence of the finite duration of collision by using interpolations between ECS and quasi-static calculations, and we have evaluated the sensitivity of the band profiles to the interbranch mixing effects. Finally, an effective width is used in order to take other effects into account.

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BibTeX Citation

@article{oz01000b,
  author={Ozanne, L. and Ma, Q. and Nguyen-Van-Thanh and Brodbeck, C. and Bouanich, J. P. and Hartmann, J. M. and Boulet, C. and Tipping, R. H.},
  title={Line-mixing, finite duration of collision, vibrational shift, and non-linear density in the ν3 and 3ν3 bands of CO2 perturbed by Ar up to 1000 bar},
  year={1997},
  journal={J. Quant. Spectrosc. Radiat. Transfer},
  volume={58},
  pages={261--277},
  doi={10.1016/S0022-4073(97)00007-1},
}

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RIS Citation

TY  - JOUR
ID  - oz01000b
AU  - Ozanne, L.
AU  - Ma, Q.
AU  - Nguyen-Van-Thanh
AU  - Brodbeck, C.
AU  - Bouanich, J. P.
AU  - Hartmann, J. M.
AU  - Boulet, C.
AU  - Tipping, R. H.
PY  - 1997
TI  - Line-mixing, finite duration of collision, vibrational shift, and non-linear density in the ν3 and 3ν3 bands of CO2 perturbed by Ar up to 1000 bar
JA  - J. Quant. Spectrosc. Radiat. Transfer
VL  - 58
SP  - 261
EP  - 277
DO  - 10.1016/S0022-4073(97)00007-1
ER  -

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