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Average Elemental and Isotopic Composition of Small Solar Energetic Particle 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. (2001) Average Elemental and Isotopic Composition of Small Solar Energetic Particle Events. In: Proceedings of the 27th International Cosmic Ray Conference. Vol.8. Copernicus Systems and Technology GmbH , Berlin, Germany, pp. 3086-3089.

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Using the Solar Isotope Spectrometer on the Advanced Composition Explorer, we have measured the heavy (Z≥6) element abundances of 33 small solar energetic particle (SEP) events which occurred between 4 April, 1998 and 3 December, 2000. The events have been classified according to their elemental and isotopic composition as well as other defining characteristics. With the event-averaged heavy element fluxes, we have investigated the dependence of elemental abundances relative to those of the solar photosphere on first ionization potential (FIP). Where possible, we have examined the FIP fractionation effects on the average composition of the small SEP events, and discuss the ensuing implications for the origin and acceleration of nuclei in these events.

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:© Copernicus Gesellschaft 2001. This research was supported by NASA at Caltech (under grant NAG5-6912), JPL, and GSFC. We thank the EPAM science team for providing the proton fluxes used to define the time periods of low solar activity in this paper.
Group:Space Radiation Laboratory
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Space Radiation Laboratory2001-45
Record Number:CaltechAUTHORS:20150303-105420424
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55461
Deposited By: Deborah Miles
Deposited On:05 Mar 2015 00:58
Last Modified:09 Mar 2020 13:19

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