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Measurements of Ultraheavy Cosmic Rays with HEAO-3

Binns, W. R. and Israel, M. H. and Klarmann, J. and Garrard, T. L. and Stone, E. C. and Waddington, C. J. (1987) Measurements of Ultraheavy Cosmic Rays with HEAO-3. In: Essays in Space Science. NASA Conference Publication. No.CP-2464. NASA , Washington, DC, pp. 173-179.

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The HEAO-3 Heavy Nuclei Experiment has measured abundances of elements from ^(18)Ar to ^(92)U in the cosmic rays. The results of the ultraheavy elements, those with atomic numbers greater than 30, indicate that the sources of cosmic rays contain a mixture of r-process and s-process material similar to that found in the solar system. This result is at variance with previous indications that the sources are greatly enhanced with freshly synthesized r-process material. Apparent discrepancies between our results and the accepted solar-system abundances have led to a re-examination of data on photospheric abundances of Ge and Pb, resulting in suggested reductions in their values.

Item Type:Book Section
Related URLs:
URLURL TypeDescription Proceedings
Binns, W. R.0000-0001-6110-3407
Israel, M. H.0000-0002-8104-208X
Stone, E. C.0000-0002-2010-5462
Contact Email
Additional Information:This work was supported in part by NASA contracts NAS 8-27976, 77, 78; by NASA grants NAG 8-498, 500, 502; and by NASA grants NGR 05-002-0160, 24-005-050, 26-008-001.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
NASANAS 8-27976
NASANAS 8-27977
NASANAS 8-27978
NASANGR 05-002-160
NASANGR 24-005-050
NASANGR 26-008-001
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1986-02
Series Name:NASA Conference Publication
Issue or Number:CP-2464
Record Number:CaltechAUTHORS:20140429-140516645
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45317
Deposited By: SWORD User
Deposited On:29 Apr 2014 23:41
Last Modified:09 Mar 2020 13:18

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