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Enhancement of solar heavy nuclei at high energies in the 4 July 1974 eventRelative abundances of energetic nuclei in the 4 July 1974 solar event are presented. The results show a marked enhancement of abundances that systematically increase with nuclear charge numbers in the range of the observation, 6 less than or equal to Z less than or equal to 26 for energies above 15 MeV/nucleon. While such enhancements are commonly seen below 10 MeV/nucleon, most observations at higher energies are found to be consistent with solar system abundances. The energy spectrum of oxygen is observed to be significantly steeper than most other solar events studied in this energy region. It is proposed that these observations are characteristic of particle populations at energies approximately 1 MeV/nucleon, and that the anomalous features observed here may be the result of the high energy extension of such a population that is commonly masked by other processes or populations that might occur in larger solar events.
Document ID
19770009027
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Bertsch, D. L. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Reames, D. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
December 1, 1976
Subject Category
Solar Physics
Report/Patent Number
NASA-TM-X-71258
X-662-76-293
Accession Number
77N15970
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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