Physics
Scientific paper
May 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80.1875n&link_type=abstract
Journal of Geophysical Research, vol. 80, May 10, 1975, p. 1875-1879.
Physics
6
D Lines, Io, Mineralogy, Planetary Radiation, Proton Irradiation, Emission Spectra, Jupiter (Planet), Luminescence, Rocks, Silicates, Sodium
Scientific paper
The effectiveness of low-keV range protons in producing Na line emission from selected sodium-bearing rock and mineral samples is examined. Laboratory experiments show that substantial Na-D line emission is produced by 3- to 5-keV proton bombardment of silicate and halite rock powders. It is found that emission intensity and energy efficiency are directly proportional to sodium content and are dependent on total dose, dose rate, and proton energy. Na-D photon emission is considered to emanate predominantly from sputtered sodium slightly above the target surfaces. It is concluded that the Na-D line emission directly excited during surface sputtering by Jovian magnetospheric protons appears to be an observable component in the Jovian satellite Io emission.
Fanale Fraser P.
Johnson Torrence V.
Matson Dennis L.
Nash Douglas B.
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