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Galactic Cosmic Ray Neon Isotopic Abundances Measured on ACE

Binns, W. R. and Wiedenbeck, M. E. and Christian, E. R. and Cummings, A. C. and George, J. S. and Hink, P. L. and Klarmann, J. and Leske, R. A. and Lijowski, M. and Niebur, S. M. and Mewaldt, R. A. and Stone, E. C. and von Rosenvinge, T. T. and Yanasak, N. E. (2000) Galactic Cosmic Ray Neon Isotopic Abundances Measured on ACE. In: Acceleration and Transport of Energetic Particles Observed in the Heliosphere. AIP Conference Proceedings. No.528. American Institute of Physics , Melville, N.Y., pp. 413-416. ISBN 1-56396-951-3.

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Measurements of neon isotopic abundances from the ACE-CRIS experiment are presented. Abundances have been obtained in six energy intervals over the energy range of ~100≤E≤280 MeV/nucleon. These measurements are compared with the ACE-SIS data for lower energies extending down to ~8 MeV/nucleon. We find that the CRIS ^(22)Ne/^(20)Ne abundance ratio at the source is a factor of 5.0±0.3 greater than for the solar wind. The CRIS measured abundances agree well with previous experiments. The CRIS and SIS measurements are in good agreement for the higher SIS energies. However for the lower energy SIS data, where the anomalous cosmic rays (ACR) are being sampled, the ratio decreases and agrees with solar wind abundances. The implications of these results are discussed.

Item Type:Book Section
Related URLs:
Binns, W. R.0000-0001-6110-3407
Wiedenbeck, M. E.0000-0002-2825-3128
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
Additional Information:© 2000 American Institute of Physics. Issue Date: 15 September 2000. This research was supported by the National Aeronautics and Space Administration at Washington University, the California Institute of Technology (under grant NAG5-6912), the Jet Propulsion Laboratory, and the Goddard Space Flight Center. It was also supported by the McDonnell Center for the Space Sciences at Washington University.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Washington University McDonnell Center for the Space SciencesUNSPECIFIED
Subject Keywords:galactic cosmic rays, cosmic ray composition, isotope relative abundance, neon, cosmic ray energy spectra, solar wind, meteorites
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory2000-32
Series Name:AIP Conference Proceedings
Issue or Number:528
Classification Code:PACS: 98.70.Sa; 95.85.Ry
Record Number:CaltechAUTHORS:20111123-095344770
Persistent URL:
Official Citation:Galactic cosmic ray neon isotopic abundances measured on ACE W. R. Binns, M. E. Wiedenbeck, E. R. Christian, A. C. Cummings, J. S. George, P. L. Hink, J. Klarmann, R. A. Leske, M. Lijowski, S. M. Niebur, R. A. Mewaldt, E. C. Stone, T. T. von Rosenvinge, and N. E. Yanasak, AIP Conf. Proc. 528, 413 (2000), DOI:10.1063/1.1324349
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:27942
Deposited On:23 Nov 2011 18:40
Last Modified:09 Nov 2021 16:53

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