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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 12 — Apr. 20, 1998
  • pp: 2264–2270

Rotational line strengths and self-pressure-broadening coefficients for the 1.27-μm, a 1Δ g X 3Σ g -, v = 0–0 band of O2

Walter J. Lafferty, Alexander M. Solodov, Catherine L. Lugez, and Gerald T. Fraser  »View Author Affiliations


Applied Optics, Vol. 37, Issue 12, pp. 2264-2270 (1998)
http://dx.doi.org/10.1364/AO.37.002264


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Abstract

We measured at 296 K the rotational line strengths and pressure-broadening coefficients for the 1.27-μm, a1Δ g X3Σ g -, v = 0–0 band of O2 with a Fourier transform infrared spectrometer using an optical path length of 84 m, a spectral resolution of 0.01 cm-1, and sample pressures between 13 and 104 kPa. The integrated band strength is 7.79(17) × 10-6 m-2 Pa-1 [7.89(17) × 10-5 cm-2 atm-1], and the Einstein A coefficient for spontaneous emission is 2.237(51) × 10-4 s-1, which corresponds to an upper-state 1/e lifetime of 1.24(3) h. The pressure-broadening coefficients decrease with increasing N and range from 19 to 38 MHz/kPa (FWHM). The mean value for the transitions studied is 30.3(21) MHz/kPa [0.1024(71) cm-1/atm] (FWHM). The Einstein A coefficient determined here is in good agreement with the widely accepted value of 2.58 × 10-4 s-1 initially obtained by Badger et al. [J. Chem. Phys. 43, 4345 (1965)] more than 30 years ago. The standard uncertainties given above are one standard deviation.

© 1998 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.1320) Atmospheric and oceanic optics : Atmospheric transmittance
(010.4950) Atmospheric and oceanic optics : Ozone
(020.3690) Atomic and molecular physics : Line shapes and shifts
(300.1030) Spectroscopy : Absorption
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms

History
Original Manuscript: August 18, 1997
Revised Manuscript: November 3, 1997
Published: April 20, 1998

Citation
Walter J. Lafferty, Alexander M. Solodov, Catherine L. Lugez, and Gerald T. Fraser, "Rotational line strengths and self-pressure-broadening coefficients for the 1.27-μm, a1Δg–X3Σg-, v = 0–0 band of O2," Appl. Opt. 37, 2264-2270 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-12-2264

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