JAMES F. KELLY, THOMAS A. BLAKE, ROBERT L. SAMS, Pacific Northwest National Laboratory, P. O. Box 999, Mail Stop K8-88, Richland, WA 99352 (PNNL is operated for the US Department of Energy by the Battelle Memorial Institute under contract DE-AC05-76RL0 1830); ARTHUR MAKI, 15012 24th Ave. S.E., Mill Creek, WA 98012.
A supersonic free-jet spectrum of the 4 band of CF3Cl has been measured using a quantum cascade laser system. Those measurements were combined with a low temperature (-67 C) FTS spectrum of the region 1060 to 1260 cm-1 to give improved values for the rovibrational constants for the 1, 2 5, and 4 states of the CF335Cl AND CF337Cl. The principal perturbation found by earlier investigators in the 1 band is treated as a very weak Coriolis interaction at several avoided crossings of the rotational levels of the 1 state and the 2 5 state with kl <0. Room temperature FTS measurements were also made for the region 400 to 970 cm-1. With these new measurements we now have high resolution data on the states 1, 2, 3, 4, and 5. Also included in this analysis are the overtones 2 3 and 2 6 and a few hot bands.