Formation of ions and radicals from icy grains in comets

Details Formation of ions and radicals from icy grains in comets Formation of ions and radicals from icy grains in comets

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992acm..proc..249j&link_type=abstract

In Lunar and Planetary Inst., Asteroids, Comets, Meteors 1991 p 249-252 (SEE N93-19113 06-90)

Physics

Comets, Ice, Interplanetary Dust, Ions, Light (Visible Radiation), Photodetachment, Photolysis, Radicals, Solar Radiation, Anions, Cations, Comet Nuclei, Cometary Atmospheres, Electrons, Vapor Phases

Scientific paper

Two theoretical models for the formation of radicals from ice grains are examined to determine if this can explain the jets in comets. It is shown that the production rates for these radicals by the photolysis of molecules in the icy grains are not high enough to explain the jets. A new mechanism is proposed involving the release of cations and anions in the gas phase as the icy mantle surrounding the grains is evaporated. Solar visible radiation can then form radicals by photodetachment of the electrons from these anions. The production rate of radicals formed in this manner is in accord with the production rates of the observed radicals.

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