Line Broadening, Shifting, and Mixing in the Fundamental Band of CO Perturbed by N2at 301 K

Line Broadening and the Temperature Exponent of the Fundamental Band in CO–N2 Mixtures

“…(28) to estimate a value of the temperature exponent, n. This preliminary value of n, for each line, was then used to bring the widths to a common temperature of 348.0 K. The process was repeated to bring widths derived from the various data bases near room temperature to a common value of 301 K. In the following section we have chosen the new measurements at 348 K to illustrate the analysis. Similar conclusions were reached when we reanalyzed the old data files at 301 K and new files near the same temperature.…”

“…In all cases, the weak asymmetric component, arising from line mixing (52), is accounted for by including an associated dispersion curve, the amplitude of which is allowed to float in the fitting routine. When divided by the pressure, this is interpreted as the mixing coefficient (28).…”

“…The experiments described in this work were carried out using a difference-frequency laser spectrometer previously described by members of our group (23,28). The infrared radiation tunable in the 2.5-5.5 m is obtained by mixing the light from a frequency-stabilized Argon ion laser with the light from a Coherent 699-29, R6G dye laser.…”

Spectral Profiles for Atmospheric Absorption by Isolated Lines: A Comparison of Model Spectra with P- and R-Branch Lines of CO in N2 and Ar

“…Over a scan range of 40 GHz, the signal-to-noise ratio and resolution achieved was 2000:1 and Ϯ1.5 MHz (5 ϫ 10 Ϫ5 cm Ϫ1 ), respectively. Further experimental details may be found in (14) and references 28 and 29 therein.…”

Line Broadening in the Fundamental Band of CO in CO–He and CO–Ar Mixtures

“…For the convenience of the reader we repeat the brief description of the experimental apparatus. Details of the difference frequency spectrometer have been given in (16,17). The essential characteristics of the spectrometer are a spectral resolution of 2 MHz (6 ϫ 10 Ϫ5 cm…”