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Measurements of ^3He and Heavy Elements in Impulsive SEP Events

Slocum, P. L. and Christian, E. R. and Cohen, C. M. S. and Cummings, A. C. and Leske, R. A. and Mewaldt, R. A. and Stone, E. C. and von Rosenvinge, T. T. and Wiedenbeck, M. E. (1999) Measurements of ^3He and Heavy Elements in Impulsive SEP Events. In: Proceedings of the 26th International Cosmic Ray Conference. Vol.6. International Union of Pure and Applied Physics , pp. 107-110.

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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.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Christian, E. R.0000-0003-2134-3937
Cohen, C. M. S.0000-0002-0978-8127
Cummings, A. C.0000-0002-3840-7696
Leske, R. A.0000-0002-0156-2414
Mewaldt, R. A.0000-0003-2178-9111
Stone, E. C.0000-0002-2010-5462
Wiedenbeck, M. E.0000-0002-2825-3128
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.
Group:Space Radiation Laboratory
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Record Number:CaltechAUTHORS:20150212-102026660
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:54776
Deposited By: Deborah Miles
Deposited On:22 Feb 2015 22:58
Last Modified:09 Mar 2020 13:19

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