Charge states of low energy ions from the sun

Details Charge states of low energy ions from the sun Charge states of low energy ions from the sun

Dec 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975phdt........19s&link_type=abstract

Ph.D. Thesis Maryland Univ., College Park. Dept. of Physics and Astronomy.

Astronomy and Astrophysics

Astronomy

1

Atomic Energy Levels, Charge Distribution, Solar Protons, Carbon, Iron, Oxygen, Solar Flares

Scientific paper

Measurements of ionization states and energy spectra of carbon, oxygen, and iron accelerated in ten solar flare particle events are reported, for energies between 15 keV per nucleon and 600 keV per nucleon. The ionization states were remarkably constant from flare to flare, despite great variations in other event parameters. The mean ionization state for carbon was 5.7, for oxygen 6.2, and for iron 11.7, values which are similar to the respective ionization states in the solar wind. The time profile of the He/C+N+O ratio was examined, and it was found that the ratio was small early in the event, and increased with time. The energy spectra of the medium ions showed a flattening below 100 keV per nucleon, which was highly correlated with event size as measured by the event averaged flux of 130 to 220 keV protons.

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