Physics – Optics
Scientific paper
Apr 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978georl...5..241j&link_type=abstract
Geophysical Research Letters, vol. 5, Apr. 1978, p. 241-244.
Physics
Optics
4
Absorption Spectra, Infrared Absorption, Laser Outputs, Pressure Broadening, Semiconductor Lasers, Upper Atmosphere, Atmospheric Attenuation, Atmospheric Optics, High Resolution, Spectral Line Width, Stratosphere, Tuning
Scientific paper
A tunable diode laser absorption spectrometer with resolution of about 0.0001/cm was used to record air-broadened spectra of CC12F2 in two regions near 922.8/cm and 921.7/cm. In the 922.8/cm region the structure shows good intensity contrast at pressures corresponding to upper atmospheric pressures. The absorption features have a spacing of 0.014/cm, which is sufficiently wide to retain spectral structure at pressures as high as 48 torr or altitudes as low as 19 km. The apparent broadening is 2 MHz/torr. The single-line broadening coefficient for CC12F2 can be estimated to be 8 + or - 2 MHz/torr FWHM. In the 921.7/cm region the high-resolution structure is discernible up to 24 torr, but the intensity contrast is not sufficiently strong to be of use in analysis of stratospheric spectra.
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