Trapping and release of gases by water ice and implications for icy bodies

Details Trapping and release of gases by water ice and implications for icy bodies Trapping and release of gases by water ice and implications for icy bodies

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icar...63..317b&link_type=abstract

Icarus (ISSN 0019-1035), vol. 63, Sept. 1985, p. 317-332. Research supported by the Adler Fund for Space Research.

Computer Science

153

Gas-Solid Interactions, Ice, Molecular Gases, Outgassing, Trapping, Carbon Monoxide, Clathrates, Cosmochemistry, Test Facilities, Planets, Icy Bodies, Entrapment, Gases, Water Ice, Hydrogen, Argon, Carbon Monoxide, Carbon Dioxide, Methane, Neon, Nitrogen, Dynamics, Experiments, Pressure, Temperature, Freezing, Evaporation, Grains, Clathrate, Fractionation, Mixing, Ejection, Comets, Saturn, Titan, Satellites, Jupiter, Enceladus, Atmosphere, Compositon, Diagrams, Flux, Data

Scientific paper

An experimental study is conducted of the trapping and release of H2, CO, CO2, CH4, Ar, Ne, and N2 by amorphous water ice under dynamic conditions and low temperatures, beginning at 16 K. CO, CH4, Ar, and N2 are noted to be released in three or four distinct temperature ranges, each of which is due to a different trapping mechanism. CO2 did not form a clathrate under the experimental conditions in question, and H2 was trapped only at 16 K; massive ejection of ice grains was observed during the evaporation of the gas in three out of the four temperature ranges. These results are used to explain several cometary phenomena, especially those occurring at large heliocentric distances.

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