Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...238..768m&link_type=abstract
Astrophysical Journal, Part 1, vol. 238, June 1, 1980, p. 768-779.
Astronomy and Astrophysics
Astrophysics
25
Abundance, Energy Spectra, Heavy Ions, Helium Isotopes, Solar Cosmic Rays, Solar Flares, Explorer 50 Satellite, Histograms, Mass Distribution, Particle Mass, Particle Telescopes, Satellite-Borne Instruments
Scientific paper
A study is presented of the energy dependence of the He-3/He-4 between 0.44 and 4.1 MeV per nucleon for six heavy-ion-rich events observed in 1974 and 1976. The observations were made using the low-energy dE/dx vs E Ultralow-Energy Particle telescope on IMP 8. It was found that all selected heavy-ion-rich events are also enriched in He-3: that the He-3/He-4 ratio decreases with decreasing energies; and that a rapid temporal evolution of the He-3/He-4 and the Fe/(H + He) ratios is strongly correlated during one event with the maximum value at the onset. These results are analyzed in terms of a model based on the preferential injection of He-3 and Fe resulting from turbulent ion heating and subsequent Fermi acceleration.
Gloeckler George
Hovestadt Dieter
Klecker Berndt
Moebius Eberhard
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