Diode-laser measurements and calculations of CO 1-0 P(4) line broadening in the 294- to 765-K temperature range

Abstract

We present first diode-laser measurements of C 12O 16 1-0 P(4) line broadening by Ar, N 2 and H 2O at high temperatures, together with the line-intensity value at 300 K. A T -β dependence of line-widths on temperature is deduced from measurements in the 294- to 765-K and 0.2- to 1.2- atm ranges (β = 0.69±0.02, β = 0.69±0.02, β = 0.59±0.05 for Ar, N 2 and H 2O broadening, respectively). Calculations for CO-Ar and CO-N 2 with the model proposed by Robert and Bonamy give very satisfactory results.