SPUTTERING FROM A POROUS MATERIAL BY PENETRATING IONS
- Instituto Balseiro, Universidad Nacional de Cuyo, 8400 Bariloche (Argentina)
- CONICET and Instituto de Ciencias Basicas, Universidad Nacional de Cuyo, 5500 Mendoza (Argentina)
- CalTech/JPL, Pasadena, CA 91109 (United States)
- Laboratory for Atomic and Surface Physics, University of Virginia, Charlottesville, VA 22903 (United States)
- Los Alamos National Laboratory, Los Alamos, NM 94551 (United States)
- NASA Goddard Space Flight Center, Astrochemistry Branch, Code 691, Greenbelt, MD 20771 (United States)
- Department of Materials Sciences, Virginia Tech, Blacksburg, VA 24061 (United States)
Porous materials are ubiquitous in the universe and weathering of porous surfaces plays an important role in the evolution of planetary and interstellar materials. Sputtering of porous solids in particular can influence atmosphere formation, surface reflectivity, and the production of the ambient gas around materials in space. Several previous studies and models have shown a large reduction in the sputtering of a porous solid compared to the sputtering of the non-porous solid. Using molecular dynamics simulations we study the sputtering of a nanoporous solid with 55% of the solid density. We calculate the electronic sputtering induced by a fast, penetrating ion, using a thermal spike representation of the deposited energy. We find that sputtering for this porous solid is, surprisingly, the same as that for a full-density solid, even though the sticking coefficient is high.
- OSTI ID:
- 22047315
- Journal Information:
- Astrophysical Journal Letters, Vol. 743, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
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