DETERMINATION OF ABSOLUTE INFRARED INTENSITIES WITH A FOURIER-TRANSFORM SPECTROMETER

It is apparent that Fourier transform infrared spectroscopy offers a number of significant advantages in the determination of infrared intensities integrated over the rotational fine structure in vibration-rotation bands. One expects that there should be no problem with photometric accuracy; yet, before embarking on a systematic program of study, the authors believe it important to establish that the method will work in practice. As a test case the authors have chosen the nu //2 fundamental of CO//2 at 673 cm** minus **1 since this is as difficult a band as any when it comes to measuring integrated intensities.