Radiation Effects in Water Ice in the Outer Solar System

摘要

Water ice in the outer solar system can either have condensed from the gas phase or have been brought in by colliding bodies, such as interplanetary ice grains to comets. Since icy bodies lack a protective atmosphere, their surface is subject to irradiation by photons, ions and electrons. This chapter discusses how energetic radiation affects the physical and chemical properties of a pure water ice surface, and how the outcome of radiation processes depends on the properties of the surface and on the environment (atmosphere, particle flux and energies).