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The Cosmic-Ray Abundances of the Platinum-Lead Elements as Measured on HEAO-3

Fixsen, D. J. and Waddington, C. J. and Binns, W. R. and Israel, M. H. and Klarmann, J. and Garrard, T. L. and Newport, B. J. and Stone, E. C. (1983) The Cosmic-Ray Abundances of the Platinum-Lead Elements as Measured on HEAO-3. In: 18th International Cosmic Ray Conference, Bangalore, India, August 22 to September 3, 1983. Vol.9. Tata Institute of Fundamental Research , Bombay, India, pp. 119-122.

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The relative abundances of elements in the charge ranges of 75 ≤ Z ≤ 79 (platinum) and 80 ≤ Z ≤ 83 (lead) should be a sensitive indication of the contributions of the r- and s-processes in nucleosynthesis. Data from the HEAO 3 Heavy Nuclei Experiment are used to establish abundances, relative to iron, of these elements in the cosmic radiation, as well as the ratio of 'secondary' elements, in the 62 ≤ Z ≤ 74 range, to the primary lead-platinum elements. These results appear to suggest that either the source abundances are deficient in s-process elements or that they are not organized solely by first ionization potential. In addition, present propagation models can adequately represent the relative abundances of primary and secondary elements.

Item Type:Book Section
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URLURL TypeDescription
Binns, W. R.0000-0001-6110-3407
Israel, M. H.0000-0002-8104-208X
Stone, E. C.0000-0002-2010-5462
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Additional Information:This work was supported in part by NASA under contracts NAS8-27976, 77, 78 and grants NGR 05-002-160, 24-005-050, and 26-008-001.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
NASANGR 05-002-160
NASANGR 24-005-050
NASANGR 26-008-001
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Space Radiation Laboratory1983-19
Record Number:CaltechAUTHORS:20140423-142851255
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ID Code:45170
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Deposited On:24 Apr 2014 22:35
Last Modified:09 Mar 2020 13:18

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