The Millimeter and Submillimeter Rotational Spectrum of CaCH 3(X 2A 1)

Details The Millimeter and Submillimeter Rotational Spectrum of CaCH 3(X 2A 1) The Millimeter and Submillimeter Rotational Spectrum of CaCH 3(X 2A 1)

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...460l..77a&link_type=abstract

Astrophysical Journal Letters v.460, p.L77

Astronomy and Astrophysics

Astronomy

11

Ism: Molecules, Line: Identification, Molecular Data, Methods: Laboratory

Scientific paper

The pure rotational spectrum of the calcium monomethyl radical, CaCH3( X tilde 2A1), has been measured in the laboratory using millimeter/submillimeter direct absorption techniques. CaCH3 was produced by the reaction of calcium vapor and an organometallic methyl compound. Seventeen rotational transitions in the frequency range 136--377 GHz were recorded for this free radical, which is a symmetric top species with one unpaired electron. In every transition, several K-components were observed, as well as fine-structure splittings. The data were analyzed using a 2A1 Hamiltonian, and rotational and spin-rotation parameters were determined. These high-resolution measurements for CaCH3 will now enable a search for this molecule in the interstellar medium.

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