MULTIPHOTON MULTI-LASER SPECTROSCOPY OF THE V(3) MODE OF SF6 IN A MOLECULAR-BEAM

Results are presented of measurements utilizing two counter propagatin g CO2 waveguide lasers interacting simultaneously with SF6 molecules i n a molecular beam. 95 new two-photon transitions were observed and as signed, for combinations of two different CO2 laser lines. Especially transitions to levels of E(g) vibrational symmetry provide new informa tion on the parameters of the Hamiltonian because previous one-colour measurements could barely access these levels. Still no transitions we re found to levels with A1g vibrational symmetry. Some results are pre sented on three- and four-photon transitions.