Slit jet diode laser and FTIR spectroscopy of CF3I and improved analysis of the symmetric CF3 stretching chromophore absorption

Abstract We report measurements of the ν 1 fundamental absorption range of CF 3 I, involving several coupled vibrational levels. Both FTIR techniques (continuous jet, resolution up to 0.0024 cm −1 unapodized) and diode laser techniques (pulsed slit jet, resolution up to 0.001 cm −1 , achieving partial hyperfine resolution) were applied. We could newly establish a Coriolis resonance between ν 1 and ν 3 + 3ν +1 6 , and present spectroscopic parameters from an analysis involving explicitly six coupled vibrational levels. The results are discussed in relation to IR-multiphoton excitation of CF 3 I and to IR-MW double resonance experiments.