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The abundance of the actinides in the cosmic radiation as measured on HEAO 3

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. 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1086/183899 DOIArticle
http://adsabs.harvard.edu/doi/10.1086/183899ADSArticle
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
Funders:
Funding AgencyGrant Number
NASANAS 8-27976
NASANAS 8-27977
NASANAS 8-27978
NASANGR 05-002-160
NASANGR 24-005-050
NASANGR 26-008-001
Subject Keywords:cosmic rays: abundances - nucleosynthesis
Issue or Number:2
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:03 Oct 2019 06:14

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