Interstellar Diamond Xenon and Timescales of Supernova Ejecta

Details Interstellar Diamond Xenon and Timescales of Supernova Ejecta Interstellar Diamond Xenon and Timescales of Supernova Ejecta

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...463..344o&link_type=abstract

Astrophysical Journal v.463, p.344

Astronomy and Astrophysics

Astronomy

38

Ism: Dust, Extinction, Meteors, Meteoroids, Nuclear Reactions, Nucleosynthesis, Abundances, Stars: Supernovae: General

Scientific paper

The composition of isotopically anomalous Xe-H carried by interstellar diamonds in meteorites can be quantitatively explained by standard r-process nucleosynthesis, if a separation of xenon from iodine and tellurium precursors is accomplished on a timescale of a few hours after termination of the process. Such a separation process would also qualitatively account for features of Xe-L and Kr-H, and the low abundance of non-noble gas trace elements. Possible mechanisms include precondensation, loss from the diamonds upon β-decay of precursors, and charge state separation. Whether one of these mechanisms is a viable option in supernova environments on the required timescale remains to be investigated.

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