Physics
Scientific paper
Aug 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975icrc....4.1512m&link_type=abstract
In: International Cosmic Ray Conference, 14th, Munich, West Germany, August 15-29, 1975, Conference Papers. Volume 4. (A76-26851
Physics
12
Cosmic Rays, Galactic Radiation, Particle Flux Density, Pioneer Space Probes, Helium, Particle Diffusion, Particle Telescopes, Periodic Variations, Proton Flux Density, Radial Distribution, Solar Activity Effects, Solar Cycles, Solar Wind, Spectrum Analysis
Scientific paper
The paper reports revised and updated measurements of the cosmic ray radial intensity gradient made with Pioneer 10 and 11 over the radial range 1-5 AU in differential energy windows from 10-70 MeV/nucleon, and for the integral intensity exceeding 70 MeV/nucleon. In most cases small positive gradients are found of the order of a few percent per AU, with evidence for significant temporal variations. Spectral studies show the presence of the 'anomalous' helium component below 50 MeV at all radial distances from 1-5 AU.
McKibben Bruce R.
Ogallagher J. J.
Pyle Roger K.
Simpson André J.
Tuzzolino Anthony J.
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