The millimeter/submillimeter spectrum and rotational rest frequencies of mgch3(X 2a1)

M. A. Anderson, L. M. Ziurys

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


The pure rotational spectrum of the free radical MgCH3(X 2A1) has been measured in the laboratory for the first time using millimeter/submillimeter direct absorption spectroscopy. The molecule was made in a DC discharge by the reaction of magnesium vapor and dimethyl mercury. Ten rotational transitions of this species were observed in the range 176-374 GHz. MgCH3is a symmetric top molecule with net spin angular momentum. Consequently, both K structure and spin-rotation interactions were observed in every rotational transition. The data were analyzed with a 2A1Hamiltonian and rotational, centrifugal distortion, and fine-structure parameters were accurately determined. These measurements will now enable a search for this radical in interstellar and circumstellar sources to be conducted using millimeter/submillimeter telescopes.

Original languageEnglish (US)
Pages (from-to)L157-L160
JournalAstrophysical Journal
Issue number2
StatePublished - Oct 20 1995


  • ISM: Molecules
  • Line: Identification
  • Methods: Laboratory
  • Molecular data

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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