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Published 1981 | Version Published
Book Section - Chapter Open

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

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Abstract

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.

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.

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Eprint ID
45045
Resolver ID
CaltechAUTHORS:20140417-154647949

Related works

Describes
http://adsabs.harvard.edu/abs/1981ICRC....9..109W (URL)
http://naca.larc.nasa.gov/search.jsp?R=19820046866&qs=N%3D4294965377%2B4294939777%26Nn%3D4294966938%257CDocument%2BType%257CBook%252FMonograph (URL)

Funding

NASA
NAS8-27976
NASA
NAS8-27977
NASA
NAS8-27978
NASA
NGR 05-002-160
NASA
NGR 24-005-050
NASA
NGR 26-008-001

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2014-04-22
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Updated
2020-03-09
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Space Radiation Laboratory
Other Numbering System Name
Space Radiation Laboratory
Other Numbering System Identifier
1981-24