High-Resolution Determination of the Widths of Self-Broadened Lines of Carbon Monoxide

Abstract

The half-widths of self-broadened lines of carbon monoxide have been measured directly with a resolution of 0.045 cm−1 in the first overtone band at room temperature for | m | values up to 31 and for pressures between 1 and 2 atm. The results, which have an estimated accuracy of ±3.0%, vary from 0.088 cm−1·atm−1 at | m | = 1 to 0.044 cm−1·atm−1 at | m | = 31, and occupy an intermediate position relative to other measurements. The half-widths have also been determined from peak absorption measurements and previously measured line strengths and these widths agree with the directly measured values to better than 2%.