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Lead, platinum and other heavy elements in the primary cosmic radiation: HEAO-3 resultsAn observation of the abundances of cosmic-ray lead and platinum-group nuclei using data from the HEAO-3 Heavy Nuclei Experiment (HNE) which consisted of ion chambers mounted on both sides of a plastic Cherenkov counter (Binns et al., 1981) is reported. Further analysis with more stringent selections, inclusion of additional data, and a calibration at the LBL Bevalac, have allowed the determination of the abundance ratio of lead and the platinum group of elements for particles that had a cutoff rigidity R(c) 5 GV. The observed ratio for Pb/Pt is distinctly lower than that predicted by any of the standard models for cosmic ray sources. It is possible that the difference is not an indication that the cosmic ray source composition is greatly different from that of the solar system, but rather that there is less Pb in the solar system and in the r-process than is assumed in the standard models.
Document ID
19860022044
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Waddington, C. J. (Minnesota Univ. Minneapolis, MN, United States)
Binns, W. R. (Washington Univ. St. Louis, Mo., United States)
Brewster, N. R. (Minnesota Univ. Minneapolis, MN, United States)
Fixsen, D. J. (Minnesota Univ. Minneapolis, MN, United States)
Garrard, T. L. (California Inst. of Tech. Pasadena., United States)
Israel, M. H. (Washington Univ. St. Louis, Mo., United States)
Klarmann, J. (Minnesota Univ. Minneapolis, MN, United States)
Newport, B. J. (California Inst. of Tech. Pasadena., United States)
Stone, E. C. (Minnesota Univ. Minneapolis, MN, United States)
Date Acquired
August 12, 2013
Publication Date
February 1, 1986
Publication Information
Publication: NASA. Goddard Space Flight Center Nineteenth International Cosmic Ray Conference. Conference Papers: Invited Rapporteur, Highlight, MIscellaneous, Volume 9
Subject Category
Space Radiation
Accession Number
86N31516
Funding Number(s)
CONTRACT_GRANT: NAG8-498
CONTRACT_GRANT: NGR-24-005-050
CONTRACT_GRANT: NGR-26-008-001
CONTRACT_GRANT: NGR-05-002-160
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19860022011Collected WorksNineteenth International Cosmic Ray Conference. Conference Papers: Invited Rapporteur, Highlight, Miscellaneous, Volume 9
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