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Implications for Cosmic Ray Propagation from ACE Measurements of Radioactive Clock Isotope Abundances

Yanasak, N. E. and Binns, W. R. and Cummings, A. C. and Christian, E. R. 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. (1999) Implications for Cosmic Ray Propagation from ACE Measurements of Radioactive Clock Isotope Abundances. In: Proceedings of the 26th International Cosmic Ray Conference. Vol.3. International Union of Pure and Applied Physics , pp. 9-12.

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Galactic cosmic rays (GCR) interact to produce secondary fragments as they pass through the interstellar medium (ISM). Abundances of the long-lived radioactive secondaries ^(10)Be, ^(26)Al, ^(36)Cl, and ^(54)Mn can be used to a derive the confinement time of cosmic rays in the galaxy. Abundances for these species have been measured recently using the Cosmic Ray Isotope Spectrometer (CRIS) aboard the Advanced Composition Explorer (ACE) spacecraft. To interpret this data we have modeled the production and propagation of the radioactive secondaries, taking into account recently published isotopic production cross-sections. Abundances for all species are consistent with a confinement time of π_(esc) ~22 x 10^6 years.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Binns, W. R.0000-0001-6110-3407
Cummings, A. C.0000-0002-3840-7696
Christian, E. R.0000-0003-2134-3937
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:© University of Utah. Provided by the NASA Astrophysics Data System.
Group:Space Radiation Laboratory
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Space Radiation Laboratory1999-30
Record Number:CaltechAUTHORS:20150213-094618167
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:54821
Deposited By: Deborah Miles
Deposited On:20 Feb 2015 02:07
Last Modified:09 Mar 2020 13:19

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