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 Title: THE LOW-LYING ELECTRONIC STATES OF SCANDIUM MONOCARBIDE, ScC Author(s): Merer, Anthony Contributor(s): Hsu, Yen-Chu; Chen, Chiao-Wei Subject(s): Metal containing Abstract: Extensive wavelength-resolved fluorescence studies have been carried out for the electronic bands of ScC and Sc${}^{13}$C lying in the range 14000 - 16000 cm$^{-1}$. Taken together with detailed rotational analyses of these bands, these studies have clarified the natures of the low-lying electronic states. The ground state is an $Omega$ = 3/2 state, with a vibrational frequency of 648 cm$^{-1}$, and the first excited electronic state is an $Omega$ = 5/2 state, with a frequency of 712 cm$^{-1}$, lying 155.54 cm$^{-1}$ higher. These states are assigned as the lowest spin-orbit components of X$^2Pi_i$ and a$^4Pi_i$, respectively. The quartet nature of the a state is confirmed by the observation of the $^4Pi_{3/2}$ component, 18.71 cm$^{-1}$ above the $^4Pi_{5/2}$ component. The strongest bands in the region studied are two $^4Delta_{7/2}$ - $^4Pi_{5/2}$ transitions, where the upper states lie 14355 and 15445 cm$^{-1}$ above X$^2Pi_{3/2}$. Extensive doublet-quartet mixing occurs, which results in some complicated emission patterns. The energy order, a$^4Pi$ above X$^2Pi$, is consistent with the ab initio calculations of Kalemos et al.,footnote{ A. Kalemos, A. Mavridis and J.F. Harrison, J. Phys. Chem. {bf A155}, 755 (2001).} but differs from that found by Simard et al in the isoelectronic YC molecule.footnote{B. Simard, P.A. Hackett and W.J. Balfour, Chem. Phys. Lett., {bf 230}, 103 (1994).} Issue Date: 6/21/2017 Publisher: International Symposium on Molecular Spectroscopy Citation Info: APS Genre: Conference Paper / Presentation Type: Text Language: English URI: http://hdl.handle.net/2142/97196 DOI: 10.15278/isms.2017.WK05 Date Available in IDEALS: 2017-07-272018-01-29
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