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New Measurements of Solar Particle Events Enriched in Heavy Ions

Cohen, C. M. S. and Christian, E. R. and Cummings, A. C. and Leske, R. A. and Mewaldt, R. A. and Slocum, P. L. and Stone, E. C. and von Rosenvinge, T. T. and Wiedenbeck, M. E. (1999) New Measurements of Solar Particle Events Enriched in Heavy Ions. In: Proceedings of the 26th International Cosmic Ray Conference. Vol.6. International Union of Pure and Applied Physics , pp. 244-247.

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The four most heavy-ion-rich of the nine largest solar energetic particle events detected by the Solar Isotope Spectrometer on the ACE, are the focus of this paper. We have used isotopic measurements of Ne to determine the degree of charge/mass fractionation and infer the charge states of C - Ni in these events. The results indicate a source temperature of ~ 4 x 10^6 K; this and the measured abundances suggest that these four events more similar to impulsive events than gradual. Although the ^3He/^4He ratios are not enhanced to the level typical of impulsive events, there are measurable enhancements over typical solar wind values in three of the events.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Cohen, C. M. S.0000-0002-0978-8127
Christian, E. R.0000-0003-2134-3937
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 work was supported by NASA at the California Institute of Technology (under grant NAG5-6912), the Jet Propulsion Laboratory, and the Goddard Space Flight Center.
Group:Space Radiation Laboratory
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Space Radiation Laboratory1999-14
Record Number:CaltechAUTHORS:20150211-145949528
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ID Code:54745
Deposited By: Deborah Miles
Deposited On:13 Feb 2015 15:21
Last Modified:09 Mar 2020 13:19

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