Analysis of the n3+n7 combination band of CF2Cl2 from spectra obtained by diode laser and Fourier Transform Spectrometer supersonic jet techniques
Academic Article
Publication Date:
2002
abstract:
High resolution (0.0011 cm-1 full width half maximum) diode laser spectra
have been measured for mixtures of CF2Cl2 in Ne, expanded in a supersonic
planar jet. In addition interferometric Fourier Transform infrared (FTIR)
spectra have been recorded with a resolution of about 0.004 cm-1 (FWHM,
Hamming apodization) for neat CF2Cl2, expanded through a circular 200 mm
nozzle. We present the analysis of the n3+n7 combination band of
CF235Cl2 (n0 = 888.49689(10) cm-1) and CF237Cl35Cl (n0 = 883.20389(12)
cm-1). Absolute band strengths have been measured for all bands falling in
the atmospheric window (n3+n7, n6, n1 and n8) and thus being important for
monitoring CF2Cl2 in the lower troposphere and stratosphere. A Fermi
resonance coupling constant W = (15±2) cm-1 is estimated for the resonance
between n3+n7 and n6 in both isotopomers.
have been measured for mixtures of CF2Cl2 in Ne, expanded in a supersonic
planar jet. In addition interferometric Fourier Transform infrared (FTIR)
spectra have been recorded with a resolution of about 0.004 cm-1 (FWHM,
Hamming apodization) for neat CF2Cl2, expanded through a circular 200 mm
nozzle. We present the analysis of the n3+n7 combination band of
CF235Cl2 (n0 = 888.49689(10) cm-1) and CF237Cl35Cl (n0 = 883.20389(12)
cm-1). Absolute band strengths have been measured for all bands falling in
the atmospheric window (n3+n7, n6, n1 and n8) and thus being important for
monitoring CF2Cl2 in the lower troposphere and stratosphere. A Fermi
resonance coupling constant W = (15±2) cm-1 is estimated for the resonance
between n3+n7 and n6 in both isotopomers.
Iris type:
01.01 Articolo in rivista
List of contributors:
Snels, Marcellinus
Published in: