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 (528). American Institute of Physics , Melville, New York, pp. 363-370. ISBN 1-56396-951-3 http://resolver.caltech.edu/CaltechAUTHORS:20111201-093810051
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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.
|Item Type:||Book Section|
|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|
|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|
|Classification Code:||PACS: 98.70.Sa; 26.40.+r|
|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.|
|Deposited By:||Jason Perez|
|Deposited On:||01 Dec 2011 21:05|
|Last Modified:||26 Dec 2012 14:33|
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