Anomaly in the quiet-time helium spectrum at 1 MeV per nucleon

Details Anomaly in the quiet-time helium spectrum at 1 MeV per nucleon Anomaly in the quiet-time helium spectrum at 1 MeV per nucleon

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975stin...7614013g&link_type=abstract

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Physics

Abnormalities, Cosmic Rays, Helium, Solar Cycles, Spectrum Analysis, Nucleons, Particle Interactions, Solar Activity

Scientific paper

An unusual spectral feature and anomalously large abundance of helium between 0.6 and approximately 2 MeV per nucleon observed during the most quiet time periods in 1974 and 1975 indicate the presence of low energy helium of an unknown origin. Alphas below 0.6 MeV per nucleon and protons below 1.5 MeV have an E to the minus 1.8 power spectrum and the proton to alpha ratio is about 30. These less than or equal 1 MeV particles are found to be emitted continuously by the sun even during its most inactive periods.

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