Rotational energy transfer in CH3F: The ΔJ=n, ΔK=0 processes

Journal Article (Journal Article)

We report the measurement of the rates of ΔJ=n, ΔK=0(|n| ≤ 10) processes for CH3F-CH3F collisions at 300 K. The data are derived from a time-resolved millimeter/ submillimeter-infrared double resonance investigation of both the 12CH3F and the 13CH3F isotopic species. The rates were obtained via a nonlinear least-squares analysis of the data using a numerical simulation of rotational energy transfer in methyl fluoride. These rates are shown to be quantifiable in terms of the scaling law of infinite order sudden collision theory and the statistical power gap law. As a result, the numerous ΔJ=n, ΔK=0(|n| > 1) rates can be understood in terms of only two parameters, independent of isotopic species. Using these results and the results of our earlier studies of K-changing processes, we discuss how rotational energy transfer in the CH3F system in general can be described in terms of a small number of collisional processes and parameters. © 1990 American Institute of Physics.

Full Text

Duke Authors

Cited Authors

  • Everitt, HO; DeLucia, FC

Published Date

  • January 1, 1990

Published In

Volume / Issue

  • 92 / 11

Start / End Page

  • 6480 - 6491

International Standard Serial Number (ISSN)

  • 0021-9606

Digital Object Identifier (DOI)

  • 10.1063/1.458283

Citation Source

  • Scopus