Knowledge Bank

The band strength of the $\nu 1$ band of $CH3CI$ has been determine by measuring the 9 moderately isolated Q-branches, The curves of growth for these Q-branches were calculated using the molecular rotation constants given by Morillon-Chapey and Graner. A. Voigt profile was assumed for the line shape as the measurements were made in the 1.0 to 5.0 Torr pressure range. An approximate method was derived to account for blending of the Q-branches with P branch lines. As is expected, there is no evidence of a vibration rotation interaction effect on the intensities of the Q-branches.