Knowledge Bank

The widths of self-broadened lines in the first overtone band of CO at pressures from $212$ to 20 atmospheres were measured directly with a small grating menochromator whose spectral slit-width was approximately $0.25cm-1$. Line intensities were also determined but at pressures below one atmosphere. Both the line widths and intensities are believed to be in error by less than 5%. These independently determined parameters were then used with assumed line shapes to calculate the absorption, as a function of pressure, at various troughs throughout the band. Comparisons were made with actual measurements to try to obtain some information about the line shape and widths for pressures up to 60 atmospheres. The method for determining the width and intensity of the lines as well as the results obtained on widths and shapes will be presented.