ONE-DIMENSIONAL AND 2-DIMENSIONAL FOURIER-TRANSFORM SPECTROSCOPY IN THE MICROWAVE AND RADIOFREQUENCY RANGE OF TRIFLUOROMETHANE IN THE VIBRATIONAL-STATE UPSILON-6=1

For trifluoromethane, CF3H, A1-A2 splittngs with KBAR=\k-l\=3 in the d egenerate vibrational state nu6=1 have been determined using two-dimen sional radiofrequency-microwave double resonance Fourier transform spe ctroscopy. The observation of direct l-type resonance transitions with KBAR=3 has been extended to lower J values by means of microwave Four ier transform spectroscopy. The analysis yielded improved values for t he rotational constant C6, for the DELTAl= 0, DELTAk = +/- 6 interacti on constant w6 and enabled the determination of a J dependence of the DELTAl= +/- 2, DELTAk = -/+ 4 t-type interaction constant.