# ANALYSIS OF THE $0^{0}_{0}$ AND $3^{0}_{1}$ BANDS IN THE $\tilde{A} - \tilde{X}$ TRANSITION OF $YC_{2}$

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 Title: ANALYSIS OF THE $0^{0}_{0}$ AND $3^{0}_{1}$ BANDS IN THE $\tilde{A} - \tilde{X}$ TRANSITION OF $YC_{2}$ Creators: Bousquet, Robert R.; Namiki, Kei-Ichi C.; Steimle, T. C.; Merer, A. J. Issue Date: 2001 Publisher: Ohio State University Abstract: The $0^{0}_{0}$ and $3^{0}_{1}$ band systems of the $\tilde{A} ^{2}A_{1}\leftarrow \tilde{X} ^{2}A_{1}$ transition of $YC_{2}$ were recorded in high resolution using laser-induced fluorescence on molecules produced in a molecular beam. Asymetry splittings in the $\tilde{X} ^{2}A_{1}$ state were measured by recording the optical spectrum in the presence of a weak static electric $field^{a}$. Several pure rotational transitions were also recorded in the $(0,0,0) \tilde{X} ^{2}A_{1}$ vibronic state using pump/probe microwave optical double resonance spectroscopy. The three sets of parameters were combined to produce fine and hyperfine parameters for the $\tilde{A}$ and $\tilde{X}$ states. Rotational constants and structural parameters were determined for both electronic states by fitting the combined data sets to an effective hamiltonian for a rigid molecule. An interpretation of the fine structure parameters will be given. Description: $^{a}$R. Bousquet and T. C. Steimle, J. Chem. Phys. 114, 1306-1310 (2001) Author Institution: Department of Chemistry, Arizona State University; Department of Chemistry and Biochemistry, Arizona State University; Department of Chemistry and Biochemistry, University of British Columbia URI: http://hdl.handle.net/1811/20011 Other Identifiers: 2001-FC-07