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NH3 self-broadening coefficients in the ν2 and ν4 bands and line intensities in the ν2 band

✍ Scribed by H. Aroui; S. Nouri; J.-P. Bouanich

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
259 KB
Volume
220
Category
Article
ISSN
0022-2852

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✦ Synopsis

Self-broadening coefficients of NH 3 in the m 2 and m 4 bands and absolute line intensities in the m 2 band have been measured at room temperature for some selected lines in the P -and R-branches. Using a Fourier transform spectrometer, line intensities and collisional widths were obtained by fitting Voigt profiles to the measured shapes of the lines. The results of self-broadening coefficients are in reasonable agreement with calculated linewidths using a semiclassical model which reproduce rather well the systematic experimental J and K quantum numbers dependencies. Satisfactory agreement was also obtained for line intensities with previous measurements in the m 2 band. From the intensity measurements, we have determined effective transition dipole moments as well as Herman-Wallis parameters for the m 2 band.

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