Published 1999
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Measurements of ^3He and Heavy Elements in Impulsive SEP Events
Abstract
The Solar Isotope Spectrometer (SIS), an instrument on board the Advanced Composition Explorer (ACE), measures solar energetic particle (SEP) elemental and isotopic abundances during solar events. During solar quiet times, SIS measures isotopes of low-energy cosmic rays from the Galaxy and isotopes of the anomalous cosmic ray component. The heavy element content at ~10-20 MeV /nuc of two SEP events with large enhancements (>400x) of the ^3He/^4He ratio relative to coronal composition has been studied. We find heavy element abundance ratios which are consistent with those derived from past studies of ^3He-rich events within statistical limitations.
Additional Information
© University of Utah. Provided by the NASA Astrophysics Data System. This research was supported by NASA at the California Institute of Technology (under grant NAG5-69l2), the Jet Propulsion Laboratory, and the Goddard Space Flight Center.Attached Files
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Additional details
Identifiers
- Eprint ID
- 54776
- Resolver ID
- CaltechAUTHORS:20150212-102026660
Related works
- Describes
- http://adsabs.harvard.edu/abs/1999ICRC....6..107S (URL)
Funding
- NASA
- NAG5-6912
Dates
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2015-02-22Created from EPrint's datestamp field
- Updated
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2020-03-09Created from EPrint's last_modified field