Knowledge Bank

Using the technique of intracavity laser magnetic resonance we have observed and analysed over 200 resonances from the CD stretching vibration $\nu 1$ of the deuterated formyl radical, DCO. Analysis of these transitions has provided accurate determinations of the band origin, rotational, centrifugal distortion and spin rotation parameters for the $\nu 1=1$ vibrational state. In addition, by incorporating into the analysis the effects of Coriolis interaction between $\nu 1$ and $\nu 3$ we were able to determine the Coriolis coupling constant and some effective $\nu 3$ band parameters. These parameters subsequently led to the assignment of some weak lines to $\nu 3$ band transitions. The vibrational band origins were found to be; for (100), $\nu 0=1909.773$ $cm-1$; for (001), $\nu 0=1794.613$ $cm-1$.