Physics
Scientific paper
Feb 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976georl...3...53m&link_type=abstract
Geophysical Research Letters, vol. 3, Feb. 1976, p. 53-56.
Physics
5
Anisotropic Media, Particle Diffusion, Radial Distribution, Radiation Distribution, Solar Protons, Interplanetary Magnetic Fields, Interplanetary Medium, Pioneer 10 Space Probe, Pioneer 11 Space Probe, Solar Flares
Scientific paper
The anisotropy of solar-flare protons (greater than 3 MeV) was evaluated at the time of maximum for each of 24 events measured by Pioneers 10 and 11 and was observed to decrease gradually between 1 and 4.7 AU. Since diffusive streaming is related directly to the effective diffusion coefficient parallel to the interplanetary spiral magnetic field, these observations provide a measure of the radial dependence of interplanetary diffusion parameters. Analysis of these results suggests that the spiral field increases gradually with heliocentric distance. An expression is given for the radial dependence of that field.
McCarthy J. J.
Ogallagher J. J.
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