Charge States and Energy-Dependent Composition of Solar-Flare Particles
- 2 April 1973
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 30 (14), 669-671
- https://doi.org/10.1103/physrevlett.30.669
Abstract
During a weak solar flare, energy spectra of He, O, and Fe from 0.2 to ∼ 30 MeV per nucleon were measured with glass and plastic detectors exposed on the Apollo 16 spacecraft. The spectra were very steep and the abundance ratios Fe/O and O/He decreased rapidly with energy, approaching solar atmospheric ratios at energies above ∼ 5 MeV per nucleon. The shapes of the rigidity spectra suggest that the ions were completely stripped while being accelerated.Keywords
This publication has 9 references indexed in Scilit:
- Enrichment of Heavy Nuclei in the 17 April 1972 Solar FlarePhysical Review Letters, 1973
- The Preferential Acceleration of Heavy Nuclei in Solar FlaresThe Astrophysical Journal, 1972
- The Abundances of Solar Accelerated Nuclei from Carbon to IronThe Astrophysical Journal, 1972
- Composition and Energy Spectra of Heavy Nuclei with 0.5 < E < 40 MeV Per Nucleon in the 1971 January 24 and September 1 Solar FlaresThe Astrophysical Journal, 1972
- A comparison of measurements of the charge spectrum of solar cosmic rays from nuclear emulsions and the Explorer 35 solid-state detectorJournal of Geophysical Research, 1972
- Charge States and Charge-Changing Cross Sections of Fast Heavy Ions Penetrating Through Gaseous and Solid MediaReviews of Modern Physics, 1972
- Enrichment of Very Heavy Nuclei in the Composition of Solar Accelerated ParticlesThe Astrophysical Journal, 1972
- Enhanced Emission of Iron Nuclei in Solar FlaresPhysical Review Letters, 1971
- Composition of solar cosmic raysSpace Science Reviews, 1965