Enrichment of heavy nuclei in He-3-rich flares

Details Enrichment of heavy nuclei in He-3-rich flares Enrichment of heavy nuclei in He-3-rich flares

Oct 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...201l..95h&link_type=abstract

Astrophysical Journal, vol. 201, Oct. 15, 1975, pt. 2, p. L95-L97.

Astronomy and Astrophysics

Astrophysics

40

Abundance, Helium Isotopes, Solar Cosmic Rays, Solar Flares, Atomic Weights, Augmentation, Explorer 41 Satellite, Heavy Nuclei, Hydrogen Isotopes, Particle Acceleration, Particle Emission

Scientific paper

IMP-7 observations of five solar-flare particle events characterized by He-3 enrichment are reported which show that such events are also enriched in nuclei with charges (Z) of at least 6. The ratio of these nuclei to H-1 at approximately 3 MeV/nucleon was found to be enriched by about 10 to 100 times, while the ratio with respect to He-4 was enriched by about 3 to 30 times. It is suggested that the simultaneous enhancement of He-3 and the heavier nuclei as well as the absence of H-2 and H-3 during the observed events may be partly due to a preferential acceleration process which depends on the ratio of the square of the charge to the atomic weight of the nuclei.

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