Short-lived p-nuclides in the early solar system and implications on the nucleosynthetic role of X-ray binaries

N. Dauphas, T. Rauscher, B. Marty, L. Reisberg

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41 Citations (Scopus)
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Abstract

The data available for short-lived p-nuclides are used in an open nonlinear model of the chemical evolution of the Galaxy in order to discuss the origin of extinct radionuclides, the stellar sources of p-nuclides, and the chronology of solar system formation. It is concluded that the observed abundances of Tc-97, Te-98, Nb-92, and Sm-146 in the early solar system are consistent with nucleosynthesis in type II supernovae during continuous chemical evolution of the Galaxy and a subsequent short isolation of the presolar molecular cloud from fresh nucleosynthetic inputs. However, further work on supernova models is needed before p-radionuclides will comprise reliable cosmochronometers. Despite these limitations, we argue that niobium-92 can be used to test whether the rp-process contributed to the synthesis of light p-nuclides in the Mo-Ru region.

Original languageEnglish
Pages (from-to)287C-295C
Number of pages9
JournalNuclear Physics A
Volume719
DOIs
Publication statusPublished - 19 May 2003
Event17th International Nuclear Physics Divisional Conference of the European-Physical-Society - DEBRECEN, Hungary
Duration: 30 Sept 20024 Oct 2002

Keywords

  • STATISTICAL-MODEL CALCULATIONS
  • CHEMICAL EVOLUTION
  • COSMIC-RAYS
  • METEORITES
  • CROSS-SECTIONS
  • EXTINCT RADIOACTIVITIES
  • ANGRA-DOS-REIS
  • ELEMENTS
  • ASTROPHYSICAL REACTION-RATES
  • ACCRETING NEUTRON-STARS

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