Collisional broadening of CO2IR lines. I. Diode laser measurements for CO2ndash;N2mixtures in the 295ndash;815 K temperature range

摘要

We present first diodendash;laser measurements of N2hyphen;broadened linewidths and strengths of12C16O2at high temperature. ATminus;Ndependence of linewidths on temperature is deduced from measurements in the 295ndash;815 K temperature range for theR38,R42, andR54 lines of the ngr;3band. The measured line strengths are 21.48plusmn;0.49, 12.84plusmn;0.28, and 1.82plusmn;0.04 cmminus;2thinsp;atmminus;1at 300 K for theR38,R42, andR54 lines, respectively. The corresponding halfhyphen;widths are 71.02, 70.05, and 67.81times;10minus;3cmminus;1thinsp;atmminus;1. TheNexponent takes the values 0.73plusmn;0.05, 0.72plusmn;0.02, and 0.72plusmn;0.04.