Study of the nu3 and 2nu4 interacting states of 12CF4

International audienceThe interacting nu3 and 2nu4 states of 12CF4 have been analysed by the tensorial formalism developed by the spectroscopic group at the Université de Bourgogne. Experimental data included are the nu3 and 2nu4 infrared absorption bands measured by diode lasers, and pure rotational radiofrequency and microwave transitions in the nu3 state. The nu4 band spectrum taken by Fourier transform spectrometer is also included to constrain the 2nu4 band constants. The observed badly perturbed nu3 R-branch spectrum and pure rotational transitions measured with an accuracy of 100 kHz are reproduced successfully with accuracies of 150 kHz and 450 kHz, respectively. Relations with the Hecht (Robiette) notation are discussed