Measurements of rotational relaxation cross sections for H2CO

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

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

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
Volume29
Issue number2
DOIs
StatePublished - Nov 15 1974
Externally publishedYes

Fingerprint

Masers
Inelastic scattering
Formaldehyde
Spectrometers
Gases
Scattering
cross sections
interstellar space
rotational states
masers
formaldehyde
Temperature
inelastic scattering
attenuation
spectrometers
scattering
gases
excitation
Direction compound
temperature

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Surfaces and Interfaces

Cite this

Measurements of rotational relaxation cross sections for H2CO. / Foreman, P. B.; Chien, K. R.; Kukolich, Stephen G.

In: Chemical Physics Letters, Vol. 29, No. 2, 15.11.1974, p. 295-297.

Research output: Contribution to journalArticle

Foreman, P. B. ; Chien, K. R. ; Kukolich, Stephen G. / Measurements of rotational relaxation cross sections for H2CO. In: Chemical Physics Letters. 1974 ; Vol. 29, No. 2. pp. 295-297.
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