Measurement of H2CO hyperfine structure with a two-cavity maser

S. G. Kukolich, D. J. Ruben

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Hyperfine structure on the 110 → 111 rotational transition in H2CO was measured using a two-cavity maser spectrometer with 0.3 kHz resolution. The measured spin-rotation constants are C(110) = -0.80 ± 0.05 kHz and C(111) = -3.07 ± 0.05 kHz. The hydrogen spin-spin interaction strength is D = 17.74 ± 0.10 kHz. The line center is at 4 829 659.89 ± 0.12 kHz. Properties of the beam source and computer line resolving methods are discussed briefly.

Original languageEnglish (US)
Pages (from-to)130-135
Number of pages6
JournalJournal of Molecular Spectroscopy
Issue number1
StatePublished - Apr 1971

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry


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