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Abundances of the cosmic ray β-decay secondaries and implications for cosmic ray transport

Yanasak, N. and Binns, W. R. and Christian, E. R. and Cummings, A. C. and Davis, A. J. 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 Wiedenbeck, M. E. (2000) Abundances of the cosmic ray β-decay secondaries and implications for cosmic ray transport. In: Acceleration and Transport of Energetic Particles Observed in the Heliosphere. AIP Conference Proceedings. No.528. American Institute of Physics , Melville, NY, pp. 402-405. ISBN 1-56396-951-3.

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Galactic cosmic rays (GCRs) pass through the interstellar medium (ISM) and undergo nuclear interactions that produce secondary fragments. The abundances of radioactive secondary species can be used to derive a galactic confinement time for cosmic rays using the amount of ISM material traversed by the cosmic rays inferred from stable GCR secondary abundances. Abundance measurements of long-lived species such as ^(10)Be, ^(26)Al, ^(36)Cl, and ^(54)Mn allow a comparison of propagation histories for different parent nuclei. Abundances for these species, measured in the energy range ~ 50 - 500 MeV/nuc using the Cosmic Ray Isotope Spectrometer (CRIS) aboard the Advanced Composition Explorer (ACE) spacecraft, indicate a confinement time τ(esc) 16.2±0.8 Myr. We have modeled the production and propagation of the radioactive secondaries and discuss the implications for GCR transport.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Binns, W. R.0000-0001-6110-3407
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
Wiedenbeck, M. E.0000-0002-2825-3128
Additional Information:© 2000 American Institute of Physics. Published online 15 September 2000. This research was supported by the NASA at the California Institute of Technology (under grant NAG5-6912), the Jet Propulsion Laboratory, NASA/Goddard Space Flight Center, and Washington University.
Group:Space Radiation Laboratory
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Space Radiation Laboratory2000-30
Series Name:AIP Conference Proceedings
Issue or Number:528
Record Number:CaltechAUTHORS:20150219-134914101
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55022
Deposited By: Deborah Miles
Deposited On:23 Feb 2015 04:11
Last Modified:10 Nov 2021 20:40

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