Published October 15, 1982
| Published
Journal Article
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The abundance of the actinides in the cosmic radiation as measured on HEAO 3
Abstract
The HEAO 3 detector of heavy cosmic-ray nuclei has observed one possible actinide nucleus and some 100 nuclei of the platinum-lead group of elements. The resulting upper limit of 3% for the abundance ratio of actinides to platinum-lead nuclides is significantly lower than previous results from other observations. This new limit is inconsistent with freshly synthesized, pure r-process sources for cosmic-ray nuclei in this charge interval but is consistent with a source having a composition similar to the solar system, or to aged r-process material. We observe no events with a charge greater than 96.
Additional Information
© 1982 The American Astronomical Society. Received 1982 January 29; accepted 1982 June 30. We thank T. J. Aufrance, B. W. Gauld, D. P. Grossman, J. Hanlon, M.D. Jones, K. E. Krombel, and D. P. Mitchell for assistance in programming for data analysis and R. A. Mewaldt for useful discussions. The research was supported in part by NASA under contracts NAS 8-27976,77,78 and grants NGR 05-002-160, 24-005-050, and 26-008-001.Attached Files
Published - 1982ApJ___261L_117B.pdf
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Additional details
- Eprint ID
- 44121
- Resolver ID
- CaltechAUTHORS:20140304-105424511
- NAS 8-27976
- NASA
- NAS 8-27977
- NASA
- NAS 8-27978
- NASA
- NGR 05-002-160
- NASA
- NGR 24-005-050
- NASA
- NGR 26-008-001
- NASA
- Created
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2014-03-05Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Space Radiation Laboratory