Electron transfer in ion-dust grain collisions

Details Electron transfer in ion-dust grain collisions Electron transfer in ion-dust grain collisions

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mnras.184..227w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 184, July 1978, p. 227-234.

Astronomy and Astrophysics

Astronomy

8

Cosmic Dust, Electron Transfer, Hydrogen Clouds, Interstellar Matter, Ionic Collisions, Electron Tunneling, Graphite, Potential Energy, Rates (Per Time)

Scientific paper

The rate coefficient (beta) is determined for the transfer of electrons from negatively charged dust grains to positive ions during collisions and close encounters in a gas of temperature T. Complete neutralization of the ions is the most likely result, with beta approximately equal to the grain geometrical cross section times the mean ion speed times a Coulomb factor. For a normal interstellar dust to gas mass ratio (of the order of 0.01), this neutralization process is slower than radiative recombination. However, even at T = 10,000 K, charge transfer with grains can significantly increase the concentrations of neutral atoms of elements that predominantly are at least twice ionized.

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