Positions and Intensities in the 2nu4/nu1/nu3 Vibrational System of 14NH3 Near 3 µm.

Line positions and line intensities of the nu1, nu3, and 2nu4 bands of 14NH3 were analyzed using line positions from 0.0054 cm-1 apodized resolution FT spectra recorded at Orsay and using line intensities from 0.011 cm-1 unapodized resolution FT spectra recorded at Kitt Peak National Observatory.

Lambda-Splittings and Line Intensities in the 3 <-- 1 Hot Band of 14N16O: The Spectrum of Nitric Oxide in the First Overtone Region.

Intensities and Lambda-splittings have been measured for lines belonging to the 3 <-- 1 hot band of 14N16O. The vibrational transition moment and the Herman-Wallis coefficient have been determined. Hamiltonian constants have been calculated for the four vibrational states v = 0, 1, 2, and 3, and a synthetic spectrum has been generated in the first overtone region of NO, taking into account the hyperfine structure for the 2 <-- 0 band.

Lambda-Splittings and Line Intensities in the First Overtone of Nitric Oxide.

Using Fourier transform spectra, absolute line parameters (positions, Lambda splittings, and intensities) have been measured in the two allowed subbands 2Pi1/2-2Pi1/2 and 2Pi3/2-2Pi3/2 of the 2 <-- 0 vibrational band of the 14N16O molecule. These line parameters have been compared with previous experimental results and with the values available in the current HITRAN database. The measured line intensities led to the determination of the transition dipole moment as well as the Herman-Wallis coefficients.

Phase errors on interferograms: influence on the determination of positions, intensities, and widths of lines in the infrared.

The effect of a phase error on line parameter measurements by using Fourier-transform spectra is studied, showing that, to obtain accurate results without modifying the interferogram, it is necessary to adjust a computed spectrum to an experimental spectrum in which the phase error is taken into account.

Measurements of collisional linewidths in the nu(2) band of H(2)O from Fourier-transformed flame spectra.

The collisional widths of more than 200 transitions belonging to the v(2) band of the H(2)O molecule were measured by using the Fourier-transformed spectra of an air-methane flame at 2000 K. A nonlinear least-squares method was used to determine the line widths for a wide range of J (up to 28) and K(a) (up to 14) quantum number values. Finally, an analysis of the results as functions of J and K(a) is presented.