Knowledge Bank

A sample of $CHD2F$ has been synthesized, in isotopic purity above $95\%$. The four fundamentals $\nu 4,\nu 5,\nu 6and\nu 9$ all occur in the general region of $CO2$ laser lines. Optical pumping of this substance results in FIR laser action on a number of lines; some of the strongest ones are associated with absorption of the $CO2$ pumping lines by the $\nu 6$ band. Assignments of the FIR emission lines will be discussed, along with progress on the analysis of the band. We show that one of the weak FIR lines from pumping $CD3F2$ is actually due to a small amount of $CHD2F$ present as an isotopic impurity. Further, some OODP signals from a sample of $CD3F3$ are also shown to be due to $CHD2F$. 1. M. S. Tobin, private communication and to be published. 2. Tobin, Sattler and Wood, Opt, Lett. 4, 384 (1979). 3. G. Duxbury and H, Kato, Chem. Phys. 66, 161 (1982).