Internal-Energy Distribution of Molecular Ions in Drift Tubes

  • L. A. Viehland


The nonreactive motion of trace amounts of a single ion species through a dilute gas in a drift tube is influenced by the gas temperature, T, by the ratio, E/N, of the electric field strength to the gas number density, and by the details of the ion-neutral collisions. On the macroscopic level, this motion is described in terms of the gaseous ion transport coefficients such as the standard mobility, Ko, and the diffusion coefficients, D and D, parallel and perpendicular to the direction of the electric field. On the microscopic level, this motion is described in terms of the position, velocity and internal-energy state of each ion and neutral as a function of time, since quantum-mechanical effects are completely negligible except for electrons and for very light ions at extremely low values of T and E/N. The connection between these levels of description is through the distribution function fi (r,v,t) for ions in internal state i at position r with velocity v at time t, and through the similar distribution functions for each neutral species.


Drift Tube Moment Theory Relative Kinetic Energy Standard Mobility Polyatomic Species 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    C. S. Wang Chang, G. E. Uhlenbeck and J. de Boer, in “Studies in Statistical Mechanics”, Vol. 2, eds. J. de Boer and G. E. Uhlenbeck, North-Holland, Amsterdam, 1964.Google Scholar
  2. 2.
    E. W. McDaniel and E. A. Mason, “The Mobility and Diffusion of Ions in Gases”, Wiley-Interscience, New York, 1973.Google Scholar
  3. 3.
    L. G. H. Huxley and R. W. Crompton, “The Diffusion and Drift of Electrons in Gases”, Wiley-Interscience, New York, 1974.Google Scholar
  4. 4.
    K. Kumar, H. R. Skullerud and R. E. Robson, Aust. J. Phys. 33, 343, 1980.ADSMathSciNetGoogle Scholar
  5. 5.
    S. R. Hunter, Aust. J. Phys. 30, 83 1977.CrossRefADSMathSciNetGoogle Scholar
  6. S. Kuhn and H. R. Skullerud, preceeding article.Google Scholar
  7. 7.
    L. A. Viehland, S. L. Lin and E. A Mason, Chem. Phys. 54, 341, 1981.CrossRefGoogle Scholar
  8. 8.
    F. L. Eisele, M. D. Perkins and E. W. McDaniel, J. Chem. Phys. 73, 2517, 1980.CrossRefADSGoogle Scholar
  9. 9.
    L. A. Viehland and D. W. Fahey, J. Chem. Phys. 78, 435, 1983.CrossRefADSGoogle Scholar
  10. 10.
    D. L. Albritton, At. Data Nucl. Data Tables 22 1, 1978.CrossRefADSGoogle Scholar
  11. 11.
    D. L. Albritton, in “Kinetics of Ion-Molecule Reactions”, ed. P. Ausloos, Plenum, New York, 1979.Google Scholar
  12. 12.
    I. Dotan, F. C. Fehsenfeld and D. L. Albritton, J. Chem. Phys. 68, 5665, 1978.CrossRefADSGoogle Scholar

Copyright information

© Springer-Verlag/Wien 1984

Authors and Affiliations

  • L. A. Viehland
    • 1
  1. 1.Parks College of Saint Louis UniversityCahokiaUSA

Personalised recommendations