Interstellar diamond xenon and timescales of supernova ejecta

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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.

Original languageEnglish
Pages (from-to)344-348
Number of pages5
JournalAstrophysical Journal
Issue number1 PART I
Publication statusPublished - Jan 1 1996


  • Dust, extinction
  • Meteors, meteoroids nuclear reactions, nucleosynthesis, abundances
  • Supernovae: General

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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