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Constraints on cosmic-ray acceleration and transport from isotope observations

Wiedenbeck, M. E. and Binns, W. R. 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 Mewaldt, R. A. and Stone, E. C. and von Rosenvinge, T. T. and Yanasak, N. E. (2000) Constraints on cosmic-ray acceleration and transport from isotope observations. In: Acceleration and Transport of Energetic Particles Observed in the Heliosphere. AIP Conference Proceedings. No.528. American Institute of Physics , Melville, New York, pp. 363-370. ISBN 1-56396-951-3

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Observations from the Cosmic Ray Isotope Spectrometer (CRIS) on ACE have been used to derive constraints on the locations, physical conditions, and time scales for cosmic-ray acceleration and transport. The isotopic composition of Fe, Co, and Ni is very similar to that of solar system material, indicating that cosmic rays contain contributions from supernovae of both Type II and Type Ia. The electron-capture primary ^(59)Ni produced in supernovae has decayed, demonstrating that a time ≳10^5 yr elapses before acceleration of the bulk of the cosmic rays and showing that most of the accelerated material is derived from old stellar or interstellar material rather than from fresh supernova ejecta.

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Additional Information:© 2000 American Institute of Physics. Issue Date: 15 September 2000. This research was supported by the National Aeronautics and Space Administration at the California Institute of Technology (under grant NAG5-6912), the Jet Propulsion Laboratory, the Goddard Space Flight Center, and Washington University.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Goddard Space Flight CenterUNSPECIFIED
Washington UniversityUNSPECIFIED
Subject Keywords:galactic cosmic rays; cosmic ray propagation; transport processes; acceleration; cosmic ray composition; isotope relative abundance; cosmic ray energy spectra; high-energy cosmic ray interactions, nucleosynthesis, nuclear electron capture; solar system; interstellar matter; supernovae
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory2000-29
Classification Code:PACS: 98.70.Sa; 26.40.+r
Record Number:CaltechAUTHORS:20111201-093810051
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Official Citation:Constraints on cosmic-ray acceleration and transport from isotope observations M. E. Wiedenbeck, W. R. Binns, E. R. Christian, A. C. Cummings, J. S. George, P. L. Hink, J. Klarmann, R. A. Leske, M. Lijowski, R. A. Mewaldt, E. C. Stone, T. T. von Rosenvinge, and N. E. Yanasak, AIP Conf. Proc. 528, 363 (2000), DOI:10.1063/1.1324340
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:28272
Deposited By: Jason Perez
Deposited On:01 Dec 2011 21:05
Last Modified:19 Feb 2015 21:50

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