The microwave spectrum of CuO, X 2Π, measured with optical detection

M. C L Gerry, A. J. Merer, U. Sassenberg, Timothy Steimle

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


The microwave pure rotational transitions J = 3/2←1/2 and 5/2←3/2 have been measured for gas phase CuO in its X 2Π state, using microwave-optical double resonance. The copper hyperfine structure was observed, and has been analyzed for the first time for the ground state of an orbitally degenerate transition metal-containing molecule in the gas phase. Rotational, lambda-doubling, and magnetic and electric hyperfine parameters have been evaluated; the Fermi contact parameter bF has been found to be very large and negative. The problem of determining the signs of the "off-diagonal" hyperfine parameters in 2Π electronic states is discussed.

Original languageEnglish (US)
Pages (from-to)4754-4761
Number of pages8
JournalThe Journal of chemical physics
Issue number9
StatePublished - 1987

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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