Measurements of rotational relaxation cross sections for H2CO

P. B. Foreman, K. R. Chien, S. G. Kukolich

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Cross sections for the 111, 110, 212, and 211 rotational states and for total beam attenuation of H2CO were measured using a beam maser spectrometer. Significant inelastic scattering in the forward direction was obtained for He and CF3H. Significant inelastic contributions were not observed using H2 as a scattering gas. Observed cross sections for the 111 state are larger than those for the 110 state. The relations of the present cross sections to various models for obtaining a low excitation temperature for the 111-110 doublet of formaldehyde in interstellar space is discussed.

Original languageEnglish (US)
Pages (from-to)295-297
Number of pages3
JournalChemical Physics Letters
Issue number2
StatePublished - Nov 15 1974

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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