High resolution pulsed-cw double-resonance spectroscopy on the B-1 Sigma(+)(v'=0)<-A(1)Pi(v''=0) system of CO

A 2 + 1 double-resonance laser-induced fluorescence technique is described in which the high power of a pulsed laser is combined with the narrow bandwidth of a single-mode cw ring dye laser. The combination of these laser systems allows the study of highly excited states with MHz resolution. This double-resonance technique has been applied to the study of the B-1 Sigma(+)(upsilon' = 0)