15min:

M. J. DICK, Department of Physics, University of Waterloo, 200 University Ave. West, Waterloo, ON, N2L 3G1 Canada; J.-G. WANG, P. M. SHERIDAN AND P. F. BERNATH, Department of Chemistry, University of Waterloo, 200 University Ave. West, Waterloo, ON, N2L 3G1 Canada.

The D^{2 +}(000) state of CaOH has been investigated at high resolution using the technique of optical-optical double resonance spectroscopy. CaOH was synthesized in a Broida-type oven by the reaction of H₂O₂ and calcium vapor. A linear cavity dye laser ( 1 cm^-1 bandwidth) was used to excite the band heads of the A² _1/2-X^{2 +} and A² _3/2-X^{2 +}transitions of CaOH. A Ti:Sapphire ring laser was then used to promote the molecules from the A² state to the D^{2 +} state. Assignment and analysis of the high resolution spectra is in progress and a discussion of the rotational and fine structure constants of the D^{2 +}(000) state of CaOH will be presented. In addition, high resolution studies of other higher-lying states of CaOH using optical-optical double resonance spectroscopy are in progress and preliminary results will be described.