Rotational energy distribution in a nozzle beam

S. G. Kukolich, D. E. Oates, J. H.S. Wang

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

The fraction of beam molecules in J =0, J = 1, and J=2 rotational states of OCS was measured as a function of pressure behind a nozzle beam source. The fractional populations were obtained from the intensities of microwave emission and absorption signals observed with a beam maser spectrometer. Total beam intensities were measured also. Large deviations from a Boltzmann rotational energy distribution were observed. The "effective rotational excitation temperature" obtained from fractional population was near 15°K for ,7=0, 40°K. for J = l, and 170°K for J =2 with 150 Torr nozzle pressure.

Original languageEnglish (US)
Pages (from-to)4690-4699
Number of pages10
JournalThe Journal of chemical physics
Volume61
Issue number11
DOIs
StatePublished - 1974

ASJC Scopus subject areas

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

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