Very low temperature spectroscopy: The pressure broadening coefficients for CH3F between 4.2 and 1.9 K

Daniel R. Willey, Richard L. Crownover, D. N. Bittner, Frank C. De Lucia

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


Pressure broadening parameters and cross sections for the CH 3F-He system have been measured between 4.2 and 1.9 K by means of a recently developed technique based on collisional cooling in a cryogenic cell. The cross sections for the K = 0 and K = 1 components of the J = 1-2 transition were found to be 75.2 and 66.6 Å2, respectively, at 4.2 K and 55.5 and 54.5 Å2, respectively, at 1.9 K. The cross sections at 4.2 K are about 50% larger than the 300 K values. These results are compared with earlier experimental and theoretical results obtained for the CO-He system.

Original languageEnglish (US)
Pages (from-to)6147-6149
Number of pages3
JournalThe Journal of Chemical Physics
Issue number10
StatePublished - Jan 1 1988
Externally publishedYes

ASJC Scopus subject areas

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


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