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s-process studies - Xenon and krypton isotopic abundancesWe propose an analysis of the s-process contributions to the isotopes of xenon and krypton. The object is to aid studies of the possibility that meteorites may contain gas that was carried in presolar grains that were grown in stellar ejecta and that were not degassed prior to incorporation into parent bodies. That model suggests routine interstellar fractionation of s-isotopes from r-isotopes owing to differential incorporation into dust. We show that a deficiency of s-process nuclei cannot yield details of Xe-X, but the gross similarities are strong enough to lead one to think that such a deficiency may play a role in a more complicated explanation. We predict the existence of an s-rich complement somewhere if fractional separation of this type has played a role in Xe-X. We show that the analogous decomposition of krypton is more uncertain, and we call for measurements of neutron-capture cross sections to alleviate these uncertainties.
Document ID
19780066146
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Clayton, D. D.
(Rice Univ. Houston, TX, United States)
Ward, R. A.
(Rice University Houston, Tex., United States)
Date Acquired
August 9, 2013
Publication Date
September 15, 1978
Publication Information
Publication: Astrophysical Journal
Subject Category
Astrophysics
Accession Number
78A50055
Funding Number(s)
CONTRACT_GRANT: NSG-7361
CONTRACT_GRANT: NSF AST-74-20076
Distribution Limits
Public
Copyright
Other

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