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dc.contributor.author
Bahr, D.A.
dc.contributor.author
Famá, M.
dc.contributor.author
Vidal, Ricardo Alberto
dc.contributor.author
Baragiola, Raul Antonio
dc.date.available
2017-12-10T15:16:26Z
dc.date.issued
2001-12
dc.identifier.citation
Bahr, D.A.; Famá, M.; Vidal, Ricardo Alberto; Baragiola, Raul Antonio; Radiolysis of water ice in the outer solar system: Sputtering and trapping of radiation products; American Geophysical Union; Journal of Geophysical Research; 106; 12-2001; 33285-33290
dc.identifier.issn
0148-0227
dc.identifier.uri
http://hdl.handle.net/11336/30060
dc.description.abstract
We performed quantitative laboratory radiolysis experiments on cubic water ice between 40 and 120 K, with 200 keV protons. We measured sputtering of atoms and molecules and the trapping of radiolytic molecular species. The experiments were done at fluences corresponding to exposure of the surface of the Jovian icy satellites to their radiation environment up to thousands of years. During irradiation, O2 molecules are ejected from the ice at a rate that grows roughly exponentially with temperature; this behavior is the main reason for the temperature dependence of the total sputtering yield. O2 trapped in the ice is thermally released from the ice upon warming; the desorbed flux starts at the irradiation temperature and increases strongly above 120 K. Several peaks in the desorption spectrum, which depend on irradiation temperature, point to a complex distribution of trapping sites in the ice matrix. The yield of O2 produced by the 200 keV protons and trapped in the ice is more than 2 orders of magnitude smaller than used in recent models of Ganymede. We also found small amounts of trapped H2O2 that desorb readily above 160 K.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Geophysical Union
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject.classification
Astronomía
dc.subject.classification
Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Radiolysis of water ice in the outer solar system: Sputtering and trapping of radiation products
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-11-24T13:43:52Z
dc.journal.volume
106
dc.journal.pagination
33285-33290
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Washington, DC
dc.description.fil
Fil: Bahr, D.A.. University of Virginia; Estados Unidos
dc.description.fil
Fil: Famá, M.. University of Virginia; Estados Unidos
dc.description.fil
Fil: Vidal, Ricardo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
dc.description.fil
Fil: Baragiola, Raul Antonio. University of Virginia; Estados Unidos
dc.journal.title
Journal of Geophysical Research
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1029/2000JE001324
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