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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 31, Iss. 9 — Mar. 20, 1992
  • pp: 1179–1184

Rotational and vibrational dependences of collisional linewidths in the nν2–(n − 1)ν2 hot bands of H2O from Fourier-transform flame spectra

Victor Dana, Jean-Yves Mandin, Claude Camy-Peyret, Jean-Marie Flaud, and Laurence S. Rothman  »View Author Affiliations


Applied Optics, Vol. 31, Issue 9, pp. 1179-1184 (1992)
http://dx.doi.org/10.1364/AO.31.001179


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Abstract

The collisional widths of ~160 transitions belonging mainly to the 2ν2ν2, 3ν2–2ν2, and 4ν2–3ν2 hot bands of the H216O molecule have been measured on Fourier-transform air–methane flame spectra at 2000 K and analyzed, showing a strong decrease in the collisional widths when the rotational quantum number J increases, as well as a nonnegligible decrease of the collisional widths when the υ2 vibrational quantum number increases.

© 1992 Optical Society of America

History
Original Manuscript: March 7, 1991
Published: March 20, 1992

Citation
Victor Dana, Jean-Yves Mandin, Claude Camy-Peyret, Jean-Marie Flaud, and Laurence S. Rothman, "Rotational and vibrational dependences of collisional linewidths in the nν2–(n − 1)ν2 hot bands of H2O from Fourier-transform flame spectra," Appl. Opt. 31, 1179-1184 (1992)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-31-9-1179


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References

  1. V. Dana, J.-Y. Mandin, C. Camy-Peyret, J.-M. Flaud, J.-P. Chevillard, R. L. Hawkins, J.-L. Delfau, “Measurements of collisional linewidths in the ν2 band of H2O from Fourier-transform flame spectra,” Appl. Opt. (to be published).
  2. J.-M. Flaud, C. Camy-Peyret, “The interacting states (020), (100), and (001) of H216O,” J. Mol. Spectrosc. 51, 142–150 (1974); J.-M. Flaud, C. Camy-Peyret, J.-P. Maillard, “Higher ro-vibrational levels of H2O deduced from high resolution oxygen-hydrogen flame spectra between 2800 and 6200 cm−1,” Mol. Phys. 32, 499–521 (1976); C. Camy-Peyret, J.-M. Flaud, “The interacting states (030), (110), and (011) of H216O,” J. Mol. Spectrosc. 59, 327–337 (1976); C. Camy-Peyret, J.-M. Flaud, J.-P. Maillard, G. Guelachvili, “Higher Ro-vibrational levels of H2O deduced from high resolution oxygen-hydrogen flame spectra between 6200 and 9100 cm−1,” Mol. Phys. 33, 1641–1650 (1977); and C. Camy-Peyret, J.-M. Flaud, J.-P. Maillard, “The 4ν2 band of H216O,” J. Phys. Lett. (France) 41, L23–L26 (1980). [CrossRef]
  3. The small values obtained for the standard deviations tend to show that the comparisons are significant, especially for the ν2, 2ν2–ν2, and 3ν2–2ν2 bands that involve a sufficient number of common lines. Although the vibrational decrease of the collisional widths is also observed for the 4ν2–3ν2 band, the sample of transitions belonging to this band and present in the other three is too limited to permit us to make really firm conclusions.
  4. J.-Y. Mandin, J.-P. Chevillard, J.-M. Flaud, C. Camy-Peyret, “N2-broadening coefficients of H216O lines between 8500 and 9300 cm−1,” J. Mol. Spectrosc. 132, 352–360 (1988); J.-Y. Mandin, J.-P. Chevillard, C. Camy-Peyret, J.-M. Flaud, “ν2-broadening coefficients of H216O lines between 9500 and 11500 cm−1,” J. Mol. Spectrosc. 138, 272–281 (1989); J.-Y. Mandin, J.-P. Chevillard, J.-M. Flaud, C. Camy-Peyret, “ν2-broadening coefficients of H216O lines between 13500 and 19900 cm−1,” J. Mol. Spectrosc. 138, 430–439 (1989). [CrossRef]
  5. A. D. Bykov, Yu. S. Makushkin, V. N. Stroinova, “Analysis of the effect of vibrational excitation on the halfwidth of lines in the nν2 bands of H2O,” Opt. Spectrosc. (USSR) 64, 309–312 (1988).

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