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Nucleosynthesis in neutron rich supernova ejecta

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Abstract

A nuclear reaction network of 903 different, strong and electromagnetic reactions, linking 107 chemical constituents is used to study the elements synthesized in the neutron rich material, ejected in supernova explosions. A large number of three body reactions virtually eliminates the usual bottle neck at theA=5 mass gap.

For initially high temperatures and densities,T=1010K and ϱ=7×108 gm/cm3, with expansion time scales of 10−3–10−2 sec, three differentn top ratios,n/p=4,n/p=3/2, andn/p∼1, are considered for the ejected matter. In all three cases, the material synthesized is preponderantly heavy. For then/p=4 model, the conditions at the charged particle freeze-out are ideal for the ‘r-process’. The onset of this rapid neutron capture phase is explicitly shown with a sequence of time lapse abundance plots.

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Authors and Affiliations

  1. Belfer Graduate School of Science, Yeshiva University, New York, N.Y., USA

    Michael D. Delano

  2. Belfer Graduate School of Science, Yeshiva University, New York, N.Y., USA

    A. G. W. Cameron

  3. Institute for Space Studies, Goddard Space Flight Center, NASA, New York, N.Y., USA

    A. G. W. Cameron

Authors
  1. Michael D. Delano
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  2. A. G. W. Cameron
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Delano, M.D., Cameron, A.G.W. Nucleosynthesis in neutron rich supernova ejecta. Astrophys Space Sci 10, 203–226 (1971). https://doi.org/10.1007/BF00704083

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  • DOI: https://doi.org/10.1007/BF00704083

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