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barium isotopes in allende meteorite - evidence against an extinct superheavy elementCarbon and chromite fractions from the Allende meteorite that contain isotopically anomalous xenon-131 to xenon-136 (carbonaceous chondrite fission or CCF xenon) at up to 5 x 10 to the 11th atoms per gram show no detectable isotopic anomalies in barium-130 to barium-138. This rules out the possibility that the CCF xenon was formed by in situ fission of an extinct superheavy element. Apparently the CCF xenon and its carbonaceous carrier are relics from stellar nucleosynthesis.
Document ID
19840031129
Document Type
Reprint (Version printed in journal)
Authors
Lewis, R. S.
(Chicago Univ. Chicago, IL, United States)
Anders, E.
(Chicago, University Chicago, IL, United States)
Shimamura, T.
(Chicago Univ. Chicago, IL, United States)
Lugmair, G. W.
(California, University La Jolla, CA, United States)
Date Acquired
August 12, 2013
Publication Date
December 2, 1983
Publication Information
Publication: Science
Volume: 222
ISSN: 0036-8075
Subject Category
LUNAR AND PLANETARY EXPLORATION
Funding Number(s)
CONTRACT_GRANT: NAG9-52
CONTRACT_GRANT: NAG9-49
Distribution Limits
Public
Copyright
Other