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A mechanism for the production of hydrogen peroxide and the hydroperoxyl radical on icy satellites by low-energy electrons
Authors:Xiaoning Pan
Institution:Group in the Radiation Sciences, Department of Nuclear Medicine and Radiobiology, Faculty of Medicine, University of Sherbrooke, Sherbrooke, Quebec J1H 5N4, Canada
Abstract:Hydrogen peroxide (H2O2) is one of the minor constituents of the water ice covered surfaces of the jovian satellites Europa, Ganymede, and Callisto. Here we demonstrate that H2O2 production may be initiated by the dissociative electron attachment (DEA) of low-energy electrons (LEEs) to water molecules. Electronic excitation or ionization by electrons also contributes to H2O2 formation at higher electron energies. Finally, we show that hydroperoxyl (HO2) radicals could be formed on the surfaces of icy satellites by LEE impact.
Keywords:Solar System  Satellites of Jupiter  Low-energy electrons  Water ices  Radiation chemistry
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