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

Fourier Transform Infrared Spectroscopy for the Measurement of Spectral Line Profiles

“…As expected the line intensities in the ν 2 band (Aroui et al, 2003) are much larger than those reported previously (Aroui et al, 1998;Cottaz et al, 2001;Hadded et al, 2001) for the ν 4 band and also several times larger than the intensities in the ν 1 and ν 3 bands (Markov, 1993).…”

“…The results are listed in Refs. (Aroui et al, 2003;Hadded et al, 2001) for symmetric and asymmetric transitions for the ν 2 and ν 4 bands of NH 3 .…”

“…where H JK is the Höln-London factor (Aroui et al, 2003). σ is the wave number of the line under study.…”

“…(17) show significant rotational dependencies (Aroui et al, 1998(Aroui et al, , 2003 which are mainly caused by vibration-rotation interactions (l-type interactions in the ν 4 band and Coriolis interaction between ν 4 and 2ν 2 bands): they decrease with J for a fixed value of K and increase with K for a given J.…”

“…Table 2 along with the standard deviation of the fits (Aroui et al, 2003). In this table, the A J and A JJ(R) parameters cannot be determined for ν 2s , since, for this partial band, the fits were performed only for 7 transitions pertaining to the J = 10 manifold, whereas for asymmetric ν 2a partial band the fits were performed for 62 transitions.…”