# MICROWAVE SPECTROSCOPY OF THE MgNC RADICAL: THE FIRST RADIOASTRONOMICAL IDENTIFICATION OF Mg-BEARING MOLECULE

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 Title: MICROWAVE SPECTROSCOPY OF THE MgNC RADICAL: THE FIRST RADIOASTRONOMICAL IDENTIFICATION OF Mg-BEARING MOLECULE Creators: Kagi, E.; Takano, S.; Kawaguchi, K.; Hirano, Tsuneo; Saito, S. Issue Date: 1993 Publisher: Ohio State University Abstract: The microwave spectrum of the lenear MgNC radical was observed for the first time in a high temperature cell coupled with DC discharge in a mixture of Mg vapor, cyanogen, and argon. The ground state ($^{2}\Sigma$) spectrum observed between 250 and 370 GHz was analyzed to determine the rotational, centrifugal distortion, and spin-rotation constants: $B_{0}=5966.8969(24) MHz, D_{0}=0.004 2338(35) MHz, H_{0}=0.308(16)\times 10^{-7}$ MHz, and $\gamma_{0} =15.219(13)$ MHz, with one standard deviation in parentheses. The obtained molecular constants enable us to assign six unidentified lines in $IRC+10216$ (Guelin $et al.^{1}$) to the transitions of MgNC. Many spectral lines of the $\nu_{2}$ bending vibrational excited states have been also observed: The detail analysis will be presented. Description: $^{1}$ M. Guelin, J. Cernicharo, C. Kahane, and J. Gomez-Gonzalez, Astron. Astrophys. 157, L17, (1986) Author Institution: Department of Chemistry, Ochanomizu University; Department of Chemistry, Institute for Molecular Science; Department of Chemistry, Nobeyama Radio Observatory URI: http://hdl.handle.net/1811/18472 Other Identifiers: 1993-MG-11