Isotopically anomalous xenon in meteorites - A new clue to its origin

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Abundance, Meteoritic Composition, Nuclear Fusion, Supernovae, Xenon Isotopes, Ejecta, Isotopic Enrichment, Meteorites, Xenon, Isotopic Anomalies, Origin, Fission, Enrichment, Nucleosynthesis, Abundance, Supernova, Residue, Isotopes, Xenon 129, Iodine 129, Superheavy Elements, Allende Meteorite

Scientific paper

The CCF xenon component in primitive meteorites, which has been attributed either to fission of a superheavy element or to nucleosynthesis in a supernova, does not show the large enrichment in Xe-129 (from decay of 16 Myr I-129) expected for supernova ejecta. Although this problem can be circumvented by ad hoc assumptions, a fission origin of CCFXe seems more likely.

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