Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jgr...10633381g&link_type=abstract
Journal of Geophysical Research, Volume 106, Issue E12, p. 33381-33386
Physics
22
Planetology: Comets And Small Bodies: Composition, Planetology: Comets And Small Bodies: Ice, Planetology: Comets And Small Bodies: Physics And Chemistry Of Materials, Planetology: Comets And Small Bodies: Radiation And Spectra
Scientific paper
We have the ability to perform both ultraviolet (UV) photolysis (primarily Lyman-α photons, average E~10.2eV per photon) and ion irradiation (protons, E=0.8MeV) in the same experimental setup, with ices created under identical conditions. Here we present recent results on the UV and ion processing of ice mixtures at 18 K of the composition H2O+CO2+CH3OH (1:1:1) and H2O+CO2+CH4 (1:1:1). H2O, CH3OH, CH4, and CO2 are all major components of ices in most astrophysical environments (whether interstellar, cometary, or planetary). Identifications and formation rates of products were measured. Results for photolyzed and irradiated ices are contrasted. We find that similar chemical products are observed in both cases and that rates of formation are equivalent for most of the major products.
Gerakines Perry A.
Hudson Reggie L.
Moore Marla H.
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