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Millimeter-wave spectrum of the CCO radical
Yamada, C.; Saito, S.; Kanamori, H.; Hirota, E.
AA(Institute for Molecular Science, Okazaki, Aichi, Japan), AB(Institute for Molecular Science, Okazaki, Aichi, Japan), AC(Institute for Molecular Science, Okazaki, Aichi, Japan), AD(Institute for Molecular Science, Okazaki, Aichi, Japan)
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 290, March 15, 1985, p. L65, L66. (ApJL Homepage)
Publication Date:
Atomic and Molecular Physics
NASA/STI Keywords:
Abundance, Carbon Suboxides, Microwave Spectra, Millimeter Waves, Molecular Spectra, Transition Probabilities, Carbon Monoxide, Hamiltonian Functions, Interstellar Matter, Least Squares Method, Radicals, Rotational Spectra
Bibliographic Code:


The pure rotational spectrum of the CCO radical in the 3Sigma- ground electronic state has been observed in the laboratory in the region 45 - 185 GHz. The radical was generated in a 3.5 m long free space absorption cell by a DC glow discharge in carbon suboxide (C3O2). Seven rotational transitions of N = 2<-1 to 8<-7 in each triplet sublevels were precisely measured and the observed frequencies were least-squares analyzed to obtain molecular constants.

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