High-temperature vibrational-rotational relaxation in He-H2

Susan M. Tarr, Herschel Albert Rabitz

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

The vibrational-rotational relaxation of He-H2 at high temperatures is studied by applying a recently developed exponential distorted wave (EDW) technique to calculate inelastic cross sections. Particular attention is given to the role of the high rotational states in vibrational relaxation; transfer through these states is shown to be important at high temperatures. For conditions simulating He-H2 shock tube experiments, a single exponential decay is found to describe the n=0→n′→1 vibrational relaxation for all time. It is shown that this fortunate circumstance, which is important in the interpretation of such experiments, does not necessarily extend to other widely differing experimental conditions.

Original languageEnglish (US)
Pages (from-to)647-651
Number of pages5
JournalThe Journal of chemical physics
Volume68
Issue number2
DOIs
StatePublished - Jan 1 1978

All Science Journal Classification (ASJC) codes

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

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