Knowledge Bank

High-resolution Fourier Transform studies of the infrared spectrum of $CH3D$ have been carried out for the spectral region between 1 and 2 $\mu$ at both room and low (150 K) temperatures. A number of new apparently parallel type bands have been discovered, of which one centered near $6245cm-1$ appears to be a viable candidate for searches in the spectra of the outer planets. A determined rotational analysis has provided evidence of strong rotational perturbations affecting the K-structure of individual manifolds both inline position and intensity. These perturbations have confirmed the need for individual line-intensity measurements and have illustrated the inadequacy of standard theoretical rotational line strengths for quantitative line intensity measurements based on low-resolution band strength. This research is sponsored in part by NASA Grant NSG-7499.