The millimeter-wave spectrum of the MgH and MgD radicals

Details The millimeter-wave spectrum of the MgH and MgD radicals The millimeter-wave spectrum of the MgH and MgD radicals

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...402l..21z&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 402, no. 1, p. L21-L24.

Astronomy and Astrophysics

Astrophysics

15

Astronomical Spectroscopy, Deuterium, Free Radicals, Hydrides, Magnesium Compounds, Millimeter Waves, Absorption Spectra, Interstellar Matter, Vibrational Spectra

Scientific paper

The pure rotational spectrum of MgH radical (X 2 Sigma (+)) in its ground state v = 0 and v = 1 vibrational modes has been observed in the laboratory using millimeter/submillimeter direct absorption spectroscopy. The rotational spectra of two isotopically substituted species, MgD and (Mg-26)H, have been detected as well. All six hyperfine components of the N = 0 -1 transition of MgH in its v = 0 and v = 1 states have been directly measured to an accuracy of +/-50 kHz, and the five components have been observed for (Mg-26)H. The N = 0 +/-1 and N = 1 -2 transitions of MgD have also been detected. Rotational, fine structure, and hyperfine constants were determined for all species from a nonlinear least-squared fit to the data using a 2 Sigma Hamiltonian.

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