Fourier transform spectroscopy of atmospheric gases

Michel R. Carleer; Sophie Fally; Reginald Colin; Alain Jenouvrier; Bernard Coquart; Marie-France Merienne; Ann Carine Vandaele; Christian Hermans

doi:10.1117/12.332640

15 December 1998 Fourier transform spectroscopy of atmospheric gases

Michel R. Carleer, Sophie Fally, Reginald Colin, Alain Jenouvrier, Bernard Coquart, Marie-France Merienne, Ann Carine Vandaele, Christian Hermans

Author Affiliations +

Proceedings Volume 3493, Spectroscopic Atmospheric Environmental Monitoring Techniques; (1998) https://doi.org/10.1117/12.332640
Event: Remote Sensing, 1998, Barcelona, Spain

Abstract

NO₂ absorption cross-sections have been obtained at 220 K and 294 K at a resolution of 2 cm^-2 from a series of spectra recorded with pure NO₂ at pressures from 0.007 to 2 torr. The N₂O₄ absorption cross-section has been obtained at 220 K. The uncertainty in the NO₂ cross-sections is estimated to be less than 3 percent for the spectral region below 40000 cm^-1 at 294 K, 3 percent below 30000 cm^-1 at 220 K. Temperature and pressure effects have been observed. Comparison with literature data show good agreement between 37500 and 20000 cm^-1. O₂ absorption spectra have been recorded at high and low resolution in the UV. A re-analysis of the three Herzberg band systems has been performed, extending the rotational assignment up to N equals 31 and identifying several new vibrational bands. Determination of the integrated intensities and oscillator strengths of the bands has been performed. These values have been compared with data of the literature. Spectra recorded with increasing pressures of N₂ or Ar show that the structure d continuum overlapping the Herzberg bands cannot be explained by O₂-O₂ absorption, but comes from collision induced absorption. Low resolution spectra have also been recorded in the visible region in order to determine the (O₂)₂ absorption cross-section.

Citation Download Citation

Michel R. Carleer, Sophie Fally, Reginald Colin, Alain Jenouvrier, Bernard Coquart, Marie-France Merienne, Ann Carine Vandaele, and Christian Hermans "Fourier transform spectroscopy of atmospheric gases", Proc. SPIE 3493, Spectroscopic Atmospheric Environmental Monitoring Techniques, (15 December 1998); https://doi.org/10.1117/12.332640

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