Leske, R. A. and Mewaldt, R. A. and Cohen, C. M. S. and Christian, E. R. and Cummings, A. C. and Slocum, P. L. and Stone, E. C. and von Rosenvinge, T. T. and Wiedenbeck, M. E. (2001) Mass Fractionation in Solar Energetic Particles and the Isotopic Composition of the Corona. In: Proceedings of the 27th International Cosmic Ray Conference. Vol.8. Copernicus Systems and Technology GmbH , Berlin, Germany, pp. 3142-3145. https://resolver.caltech.edu/CaltechAUTHORS:20150303-102937851
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Abstract
Using the Solar Isotope Spectrometer on the Advanced Composition Explorer, the isotopic composition of solar energetic particles (SEPs) has been measured in 18 large SEP events for abundant elements from C through Ni at energies of tens of Me V /nucleon. Although SEP isotopic composition is found to vary widely from event to event, it is strongly correlated with the elemental composition, suggesting that elemental and isotopic fractionation relative to the coronal source are largely governed by the same processes. Using empirical correlations to correct for the fractionation yields preliminary coronal isotopic abundance values in good agreement with those found in the solar wind, with comparable accuracy.
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| Additional Information: | © Copernicus GmbH. This research 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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| Record Number: | CaltechAUTHORS:20150303-102937851 | ||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20150303-102937851 | ||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
| ID Code: | 55460 | ||||||
| Collection: | CaltechAUTHORS | ||||||
| Deposited By: | Deborah Miles | ||||||
| Deposited On: | 05 Mar 2015 01:01 | ||||||
| Last Modified: | 22 Nov 2019 09:58 |
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