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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 25, Iss. 11 — Jun. 1, 1986
  • pp: 1848–1853

Absolute intensities and self-, N2-, and air-broadened Lorentz halfwidths for selected lines in the ν3 band of 12CH3D from measurements with a tunable diode laser spectrometer

V. Malathy Devi, Curtis P. Rinsland, D. Chris Benner, Mary Ann H. Smith, and K. B. Thakur  »View Author Affiliations


Applied Optics, Vol. 25, Issue 11, pp. 1848-1853 (1986)
http://dx.doi.org/10.1364/AO.25.001848


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Abstract

Absolute intensities were measured at room temperature for thirty-nine lines in the qQ, qP, and qR branches of the ν3 (A1) parallel-type band of 12CH3D between 1250 and 1340 cm−1 using a tunable diode laser spectrometer. Although the line intensities were determined to a precision ≈3%, the square of the vibrational transition dipole moment matrix element derived from each mean line intensity varied by ≈20%, indicating intensity perturbations possibly caused by Coriolis interaction with the nearby ν6 fundamental. Room temperature air- and N2-broadened halfwidths have also been determined for seventeen of these lines and the measured halfwidth values varied from 0.023 cm−1 atm−1 for high J,K transitions to ∼0.067 cm−1 atm−1 for low J,K transitions. The average of the ratios of N2- to air-broadened halfwidths was 1.01, with a standard deviation of 0.01, indicating almost equal broadening efficiencies for N2 and air. Room temperature self-broadened halfwidths were also determined for three transitions with a mean value of 0.0803 ± 0.0010 cm−1 atm−1.

© 1986 Optical Society of America

History
Original Manuscript: February 15, 1986
Published: June 1, 1986

Citation
V. Malathy Devi, Curtis P. Rinsland, D. Chris Benner, Mary Ann H. Smith, and K. B. Thakur, "Absolute intensities and self-, N2-, and air-broadened Lorentz halfwidths for selected lines in the ν3 band of 12CH3D from measurements with a tunable diode laser spectrometer," Appl. Opt. 25, 1848-1853 (1986)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-25-11-1848

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