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.