Laser Spectroscopy of BaOH and BaOD: Anomalous Spin-Orbit Coupling in the tilde{A}^2Π State

Details Laser Spectroscopy of BaOH and BaOD: Anomalous Spin-Orbit Coupling in the tilde{A}^2Π State Laser Spectroscopy of BaOH and BaOD: Anomalous Spin-Orbit Coupling in the tilde{A}^2Π State

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mss..conferf12t&link_type=abstract

"International Symposium On Molecular Spectroscopy, 64th Meeting, Held 22-26 June, 2009 at Ohio State University. http://molspec

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The tilde{A}^2Π-tilde{X}^2Σ^+ transition of BaOD has been rotationally analyzed using high-resolution laser excitation spectroscopy. BaOD molecules were synthesized in a Broida-type oven and detected using a single mode Ti:Sapphire laser. Measured rotational lines have been assigned, and rotational and fine structure parameters determined through a combined least-squares fit with the millimeter-wave pure rotational data of the tilde{X}^2Σ^+ state. A significantly different spin-orbit coupling constant from the corresponding value for BaOH was observed and attributed to global and local perturbations arising from vibrationally excited bands of the tilde{A}'^2Δ state. Λ-doubling constants for the tilde{A}^2Π state also showed poor agreement with the predictions of the pure precession model. To further understand the nature of the interactions between the tilde{B}^2Σ^+, tilde{A}^2Π and tilde{A}'^2Δ states of BaOH, a V-type optical-optical double resonance spectroscopy experiment was prepared to locate the lower-lying excited state levels. Preliminary results have yielded a band in close proximity on the lower wavenumber side of the tilde{A}^2Π_{1/2} spin component of BaOH with a relatively large p value. Further results of this ongoing experiment will be presented.

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