Physics
Scientific paper
Nov 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.5803f&link_type=abstract
Journal of Geophysical Research, vol. 85, Nov. 1, 1980, p. 5803-5811.
Physics
11
Energetic Particles, Proton Belts, Radiation Trapping, Saturn Atmosphere, Cerenkov Counters, Pioneer 11 Space Probe, Proton Density (Concentration), Radial Distribution, Saturn, Radiation Belts, Charged Particles, Protons, Pioneer 11, Data, Distribution, Absorption, Electrons, Satellites, Cosmic Rays, Albedo, Neutrons, Rings, Trapped Radiation Detector, Characteristics, Equipment, Particles, Spectrum, 1979 S2, Mimas, Diagrams, Trajectories, Energy
Scientific paper
Very energetic protons are trapped in the inner Saturnian radiation belt. The University of California at San Diego instrument on Pioneer 11 has definitely identified protons of energy greater than 80 MeV on channel M3 and has tentatively detected protons of energy greater than 600 MeV on channel C3. The spatial distribution of the protons is distinct from that of the trapped electrons, the main difference being that the protons are strongly absorbed by the innermost moons and that the electrons are not. The source strength for injecting protons by the decay of cosmic ray albedo neutrons generated in the rings of Saturn has been estimated. The required proton lifetime is approximately 20 years.
Fillius Walker
McIlwain Carl E.
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