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The Abundances of Ultraheavy Elements in the Cosmic Radiation

Stone, E. C. and Waddington, C. J. and Binns, W. R. and Garrard, T. L. and Gibner, P. S. and Israel, M. H. and Kertzman, M. P. and Klarmann, J. and Newport, B. J. (1987) The Abundances of Ultraheavy Elements in the Cosmic Radiation. In: Proceedings of the 21st International Cosmic Ray Conference. Vol.1. , Nakau, Russia, pp. 366-369.

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Analysis of a new, higher resolution data set from the Heavy Nuclei Experiment on the HEA0-3 spacecraft has yielded the cosmic ray abundances relative to iron of oddeven element pairs with atomic number, Z, in the range 33≤Z≤60. The abundances are consistent with a solar-system source provided an allowance is made for a source fraetionation based on first ionization potential (FIP). However, extending this analysis· to element groups with Z>60, we find enhancements of the Pt group (74≤Z≤80) abundance relative to the solar system and a corresponding increase in the largely secondary nuclei in the range 62≤Z≤73, in agreement with recent Ariel-6 results. These abundances suggest an enhancement of the r-process contribution to the source of the Z > 60 nuclei.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Stone, E. C.0000-0002-2010-5462
Binns, W. R.0000-0001-6110-3407
Israel, M. H.0000-0002-8104-208X
Additional Information:© INR. Provided by the NASA Astrophysics Data System. This research was supported in part by NASA under grants NAG 8-498, 500, and 502 and NCR 05-002-160, 24-005,050, and 26-008-001.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
NASANCR 05-002-160
NASANCR 24-005-005
NASANCR 26-008-001
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1987-05
Record Number:CaltechAUTHORS:20140512-133126620
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45693
Deposited By: Joy Painter
Deposited On:12 May 2014 20:48
Last Modified:09 Mar 2020 13:18

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