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Secondary Electron-Capture-Decay Isotopes and Implications for the Propagation of Galactic Cosmic rays

Niebur, S. M. and Binns, W. R. and Christian, E. R. and Cummings, A. C. and George, J. S. and Hink, P. L. and Israel, M. H. 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. and Yanasak, N. E. (2000) Secondary Electron-Capture-Decay Isotopes and Implications for the Propagation of Galactic Cosmic rays. In: Acceleration and Transport of Energetic Particles Observed in the Heliosphere. AIP Conference Proceedings. No.528. American Institute of Physics , Melville, N.Y., pp. 406-409. ISBN 1-56396-951-3.

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We report the first observation of an energy dependence in the titanium, vanadium, and chromium isotopic abundances in cosmic rays. The observations were made in the 100–500 MeV/nucleon energy interval using data from the Cosmic Ray Isotope Spectrometer on the ACE spacecraft. The ^(51)Cr and ^(49)V isotopes in cosmic rays are produced by fragmentation of heavier cosmic ray nuclides and decay only by electron capture. The observations indicate that electron-capture decay occurred primarily at the lower energies measured, and that there is a resulting energy dependence in the abundances of these isotopes and their decay products.

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
Israel, M. H.0000-0002-8104-208X
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 National Aeronautics and Space Administration at the California Institute of Technology (under grant NAG5-6912), the Goddard Space Flight Center, the Jet Propulsion Laboratory, and Washington University.
Group:Space Radiation Laboratory
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Space Radiation Laboratory2000-31
Series Name:AIP Conference Proceedings
Issue or Number:528
Record Number:CaltechAUTHORS:20150219-131410930
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55017
Deposited By: Deborah Miles
Deposited On:23 Feb 2015 04:32
Last Modified:10 Nov 2021 20:40

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