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Formation of ions and radicals from icy grains in cometsTwo 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.
Document ID
19930009983
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Jackson, William M.
(California Univ. Davis, CA, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1992
Publication Information
Publication: Lunar and Planetary Inst., Asteroids, Comets, Meteors 1991
Subject Category
Astrophysics
Accession Number
93N19172
Funding Number(s)
CONTRACT_GRANT: NAGW-1144
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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