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High-Resolution Measurements of Galactic Cosmic-Ray Neon, Magnesium and Silicon Isotopes

Mewaldt, R. A. and Spalding, J. D. and Stone, E. C. and Vogt, R. E. (1980) High-Resolution Measurements of Galactic Cosmic-Ray Neon, Magnesium and Silicon Isotopes. Astrophysical Journal, 235 . L95-L99. ISSN 0004-637X.

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The individual isotopes of galactic cosmic-ray Ne, Mg, and Si at ~0.20 amu. Our results suggest that the cosmic ray source is enriched in ^(22)Ne, ^(25)Mg, and ^(26)Mg when compared to the solar system. In particular, we find (^(25)Mg + ^(26)Mg)/^(24)Mg = 0.49(+0.23, -0.14) compared with the solar system value of 0.27, suggesting that the cosmic-ray source and solar system material were synthesized under different conditions.

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URLURL TypeDescription
Mewaldt, R. A.0000-0003-2178-9111
Stone, E. C.0000-0002-2010-5462
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Additional Information:Copyright 1980. The American Astronomical Society. W.E. Althouse, A.C. Cummings and T.L. Garrard made significant contributions to the design and development of HIST. We are grateful to the Heckman/Greiner group, including Hank Crawford, and the Bevalac staff at Lawrence Berkeley Laboratory for making the heavy-ion calibrations possible. We have benefited from discussions of nucleosynthesis with W.A. Fowler and S.E. Woosley, and discussions of cosmic-ray propagation with M.E. Wiedenbeck. This work was supported in part by NASA under contract NGR 05-002-160.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
NASANGR 05-002-160
Subject Keywords:cosmic rays; abundances, cosmic rays: general
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Space Radiaition Laboratory 1979-7
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ID Code:45009
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Deposited On:18 Apr 2014 16:52
Last Modified:20 Feb 2020 14:33

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