Relative Abundance of Iron-Group Nuclei in Solar Cosmic Rays
Abstract
The abundance of the iron-group nuclei relative to oxygen in a solar cosmic-ray event has been de- termined for the first time in the event of September 2, 1966; it was found to be (1.1 ± 0.3) X 1O~ above 24.5 MeV nucleon1. This ratio is consistent with the solar value determined spectroscopically but is over an order of magnitude smaller than the galactic cosmic-ray ratio. This result is in agreement with the concept already evolving from measurements on other nuclei that the relative abundances of solar cosmic rays reflect those of the solar photosphere for multicharged nuclei with approximately the same nuclear charge-to-mass ratio
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1969
- DOI:
- 10.1086/180383
- Bibcode:
- 1969ApJ...157L..53B