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Published 1998 | public
Journal Article

Solar energetic particle isotopic composition


We discuss isotopic abundance measurements of heavy (6 ≤ Z ≤ 14) solar energetic particles with energies from ∼15 to 70 MeV/nucleon, focusing on new measurements made on SAMPEX during two large solar particle events in late 1992. These measurements are corrected for charge/mass dependent acceleration effects to obtain estimates of coronal isotopic abundances and are compared with terrestrial and solar wind isotope abundances. An example of new results from the Advanced Composition Explorer is included.

Additional Information

© 1998 Kluwer Academic Publishers. We appreciate the contributions of C. M.S. Cohen, A. C. Cummings, T. T. von Rosenvinge, and M. E. Wiedenbeck to the development and data analysis of the SIS instrument on ACE. This work was also funded by NASA grants NAG5-2963, and NAG5-6912. One of us (D. L. Williams) would like to acknowledge support from the NASA Graduate Student Researchers Program, grant number NGT-51156.

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August 19, 2023
October 17, 2023