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 Title: MILLIMETER-WAVE SPECTROSCOPY OF MgI (~X2Σ+) Author(s): Burton, Mark Contributor(s): Ziurys, Lucy M.; Kilchenstein, K. M. Subject(s): Small molecules Abstract: The pure rotational spectrum of MgI in its ground electronic state (~{X}$^{2}$$Sigma$$^{+}$) has been measured using millimeter/submillimeter wave direct-absorption techniques. Rotational transitions arising from the v = 0, 1, and 2 vibrational states of $^{24}$MgI, as well as the v = 0 state for the isotopologues ($^{25}$MgI and $^{26}$MgI), have been measured in their natural abundance in the region of 200 – 300 GHz. Rotational, centrifugal distortion, and spin-rotation constants were determined for each isotopologue and the excited vibrational states of $^{24}$MgI. Equilibrium parameters B$_{e}$, $alpha$$_{e}, D_{e}, and gamma$$_{e}$ were ascertained and used to calculate an equilibrium bond length (r$_{e}$) for MgI. The spin-rotation coupling constants of several magnesium monohalides were examined and the contribution to the spin-rotation parameter appears to be dominated by second order spin-orbit coupling of the nearby excited A$^{2}$$Pi$ electronic state. Issue Date: 6/19/2017 Publisher: International Symposium on Molecular Spectroscopy Citation Info: APS Genre: Conference Paper / Presentation Type: Text Language: English URI: http://hdl.handle.net/2142/96901 DOI: 10.15278/isms.2017.MH06 Date Available in IDEALS: 2017-07-272018-01-29
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