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Abundances of Cosmic Ray Nuclei Heavier than _(50)Sn

Waddington, C. J. and Fickle, R. K. and Garrard, T. L. and Stone, E. C. and Binns, W. R. and Israel, M. H. and Klarmann, J. (1981) Abundances of Cosmic Ray Nuclei Heavier than _(50)Sn. In: Proceedings of the 17th International Cosmic Ray Conference. Vol.9. CEN Saclay , Gif-sur-Yvette, France, pp. 109-112.

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Preliminary results are reported from 430 days of exposure of the heavy nuclei experiment on the HEAO-3 spacecraft. These results are confined to the heavy nuclei with Z ≥ 50 and emphasize the conclusions obtained on the relative numbers of actinides and heavy stable elements in the lead-platinum region. The extreme paucity of actinides found is inconsistent with the predictions of a cosmic ray source that is highly enriched in r-process material, but quite consistent with a source whose composition is similar to that of normal solar system material. An upper limit, at the. 95% confidence level, is placed in the ratio of nuclei with Z ≥ 88/(74 ≤ Z ≤87) of 0.03.

Item Type:Book Section
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URLURL TypeDescription Technical Reports Server (NTRS)
Stone, E. C.0000-0002-2010-5462
Binns, W. R.0000-0001-6110-3407
Israel, M. H.0000-0002-8104-208X
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Additional Information:© 1981 IUPAP. Provided by the NASA Astrophysics Data System. This research was supported in part by NASA under contract NAS8-27976, 77, 78 and grants NGR 05-002-160, 24-005-050 and 26-008-001. Space Radiation Laboratory SRL ID #: 1981-24.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
NASANGR 05-002-160
NASANGR 24-005-050
NASANGR 26-008-001
Subject Keywords:Abundance, Cosmic Rays, Heavy Nuclei, Heao 3
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1981-24
Record Number:CaltechAUTHORS:20140417-154647949
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ID Code:45045
Deposited By: SWORD User
Deposited On:22 Apr 2014 19:33
Last Modified:09 Mar 2020 13:18

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