15min:

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

The C ² (000) - A ² (000) transition of SrOH has been rotationally analyzed using optical-optical double resonance (OODR) spectroscopy. SrOH was synthesized in a Broida-type oven by the reaction of H₂O₂ and strontium vapor. The OODR spectrum was measured using a broad band dye laser ( 1 cm^-1 bandwidth) and a single mode Ti:Sapphire laser as the pump (A ² - X ^{2 +}) and probe (C ² - A ² ) lasers, respectively. Rotational and fine structure parameters have been determined through a combined least-squares fit with the A ² - X ^{2 +} optical transition data and the millimeter-wave pure rotational data of the X ^{2 +} state. A significant decrease in the spin-orbit constant from the A ² to the C ² state has been observed and can be rationalized by the different atomic orbital character of the two states. The -doubling constants of the C ² state have been examined using the pure procession model and suggest that this state forms a unique perturber pair with the nearby D ^{2 +} state. In addition, the rotationally-resolved spectrum of the B' ^{2 +}(000) - A ² (000) transition has been recorded using the OODR technique. Assignment and analysis of this spectrum is in progress and preliminary results will also be presented.