The millimeter and submillimeter rotational spectrum of the MgCN radical (X 2 Sigma(+))

Details The millimeter and submillimeter rotational spectrum of the MgCN radical (X 2 Sigma(+)) The millimeter and submillimeter rotational spectrum of the MgCN radical (X 2 Sigma(+))

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...429l..41a&link_type=abstract

The Astrophysical Journal, vol. 429, no. 1, pt. 2, p. L41-L44

Astronomy and Astrophysics

Astrophysics

35

Fine Structure, Free Radicals, Hyperfine Structure, Interstellar Chemistry, Interstellar Matter, Molecular Spectroscopy, Rotational Spectra, Absorption Spectroscopy, Astronomical Spectroscopy, Microwave Spectra, Millimeter Waves, Spectral Signatures, Submillimeter Waves

Scientific paper

The pure rotational spectrum of the MgCN radical has been recorded in the laboratory using millimeter/submillimeter direct absorption spectroscopy. Twenty-seven rotational transitions of the species were observed in the range 101-376 GHz and indicate that the molecule is linear with a 2Sigma(+) ground electronic state, as predicted by theory. Spin rotation interactions were resolved in the spectra, but no hyperfine splittings were observed, which would originate with the nitrogen nuclear spin. The rotational and fine-structure constants were determined for this radical from a nonlinear least-squares fit to the data using a 2Sigma Hamiltonian. MgCN is of astrophysical interest because it is the metastable isomer of MgNC, which recently has been detected toward IRC +10216

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