Low energy cosmic ray erosion of ice grains in interplanetary and interstellar media

Details Low energy cosmic ray erosion of ice grains in interplanetary and interstellar media Low energy cosmic ray erosion of ice grains in interplanetary and interstellar media

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978natur.272..431l&link_type=abstract

Nature, vol. 272, Mar. 30, 1978, p. 431-433.

Physics

17

Ice, Interplanetary Medium, Interstellar Matter, Solar Cosmic Rays, Life (Durability), Solar Energy, Solar System, Solar Wind, Sputtering, Surface Properties

Scientific paper

The lifetime of ice grains entering the Solar System from interstellar or interplanetary media is shown to depend primarily on the erosion of water ice from the grains by solar energetic particles. In a similar process, solar cosmic rays could eject molecular species from grains in highly shielded (from UV) interstellar clouds. These suggested roles for cosmic rays in the erosion of ice grains and frozen volatiles are based on a study of the sputtering coefficients of water ice by 0.5 and 1.5 MeV protons.

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