Binns, W. R. and Fickle, R. K. and Garrard, T. L. and Israel, M. H. and Klarmann, J. and Stone, E. C. and Waddington, C. J. (1982) The abundance of the actinides in the cosmic radiation as measured on HEAO 3. Astrophysical Journal, 261 (2). L117-L120. ISSN 0004-637X. doi:10.1086/183899. https://resolver.caltech.edu/CaltechAUTHORS:20140304-105424511
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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.
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| 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. | ||||||||||||||
| Group: | Space Radiation Laboratory | ||||||||||||||
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| Subject Keywords: | cosmic rays: abundances - nucleosynthesis | ||||||||||||||
| Issue or Number: | 2 | ||||||||||||||
| DOI: | 10.1086/183899 | ||||||||||||||
| Record Number: | CaltechAUTHORS:20140304-105424511 | ||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140304-105424511 | ||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||
| ID Code: | 44121 | ||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||
| Deposited By: | Tony Diaz | ||||||||||||||
| Deposited On: | 05 Mar 2014 02:34 | ||||||||||||||
| Last Modified: | 10 Nov 2021 16:47 |
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