Line parameter measurements and calculations of CO broadened by nitrogen at elevated temperatures

Abstract

Measurements of the line strengths and collisional broadening widths of CO in a N 2 atmosphere were made from 300 to 600 K. The lines studied were the P(2), P(3), P(7), P(12), P(18), and P(22) lines of the fundamental band at 2100 cm −1. The absorption spectra were parametrically fit to a Voigt lineshape model. The band strength was determined to be 250±8 cm −2atm −1. The broadening results are compared to Anderson-Tsao-Curnutte calculations and to other experimental studies. The possibility of using an equation of the form γ(T)=γ(T 0( T 0 T ) n to extrapolate the temperature dependence of the half-widths to flame temperatures is discussed.