Physics
Scientific paper
May 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.333..240o&link_type=abstract
Nature (ISSN 0028-0836), vol. 333, May 19, 1988, p. 240, 241. NASA-NSF-supported research.
Physics
11
Gas Giant Planets, Ice, Ion Irradiation, Plasma Interactions, Satellite Surfaces, Spectral Reflectance, Brightness, Cosmic Plasma, Europa, Natural Satellites, Solar System, Sulfur, Planets, Reflectance, Spectra, Ice, Surface, Bombardment, Ions, Plasma, Icy Bodies, Satellites, Brightness, Laboratory Studies, Jupiter, Europa, Alteration, Irradiation, Absorption, Sulfur, Wavelengths, Simulations, Spacecraft Observations, Voyager Missions
Scientific paper
The first results of laboratory measurements of the wavelength dependence of the alternation of the visible reflectance of H2O ice irradiated by keV ions are presented. When the implanted species is chemically neutral, absorption is slightly enhanced below 0.55 micron. For an incident species containing sulfur, a strong absorption feature is produced at 0.4 micron, probably corresponding to S3. This occurs at too large a wavelength to account for the absorption feature observed at Europa by Voyager and therefore casts doubt on the recent interpretation of the reflectance data of Europa.
Boring J. W.
Johnson Robert E.
O'Shaughnessy D. J.
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