Astrophysics and Space Science

, Volume 188, Issue 1, pp 89–107 | Cite as

Populations of highly excited atoms and ions in the optically thin plasma

  • N. I. Rovenskaya


Treating it as a boundary-value problem, the equations of highly excited state populations of atoms and ions are theoretically studied in case of recombining plasma. Scattering and spontaneous transitions as well as those induced by background radiation, are taken into account in the kinetic equations. The kinetic coefficients for inelastic scattering of incident charged particles on highly excited atoms and ions have been calculated in the asymptotically exact case: 1.6×105 (z/n)2)T e −1 ≪1.

The distribution functions over the Rydberg states, analytically found, allow to determine amplification factor and optical depth of radio-recombination lines as functions of cosmic plasma parameters.


Radiation Excited State Charged Particle Kinetic Equation Optical Depth 
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Copyright information

© Kluwer Academic Publishers 1992

Authors and Affiliations

  • N. I. Rovenskaya
    • 1
  1. 1.Institute of Radio AstronomyAcademy of Sciences UkrSSRKharkovUSSR

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