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Big Bang Nucleosynthesis

Big Bang Nucleosynthesis. Once significant amount of Deuterium has formed the heavier elements form very fast All post-Deuterium reactions involve strong nuclear forces, large cross sections and high reaction rates Reactions proceed quickly to Helium. 56 Fe. Fusion. Fission. 5. 8. 56.

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Big Bang Nucleosynthesis

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  1. Big Bang Nucleosynthesis • Once significant amount of Deuterium has formed the heavier elements form very fast • All post-Deuterium reactions involve strong nuclear forces, large cross sections and high reaction rates • Reactions proceed quickly to Helium

  2. 56Fe Fusion Fission 5 8 56 Most of 3H, 3He gets locked up in 4He - how about heavier elements ? - Maximum binding energy at iron  elements lighter than Iron release energy when fused. - No stable nuclei with atomic number 5 or 8 - Helium has unusually large binding energy production of nuclei ceases with Helium

  3. Neutrinos and BBN

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