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

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

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ap%26ss.188...89r&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 188, no. 1, Feb. 1992, p. 89-107.

Astronomy and Astrophysics

Astrophysics

3

Atomic Excitations, Boundary Value Problems, Cosmic Plasma, Inelastic Scattering, Optical Thickness, Rydberg Series, Interstellar Matter, Kinetic Equations, Milky Way Galaxy, Radiative Recombination, Spontaneous Emission

Scientific paper

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. 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.

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