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Neutrinos and the r -process

Neutrinos and the r -process. Joshua Beun JINA Special School Monday, May 14, 2007. Big Bang…. Big Bang… Cosmic Rays and Stellar Nucleosynthesis…. Big Bang… Cosmic Rays and Stellar Nucleosynthesis… …Neutron Capture and rp -process….

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Neutrinos and the r -process

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  1. Neutrinos and the r-process Joshua Beun JINA Special School Monday, May 14, 2007

  2. Big Bang…

  3. Big Bang… Cosmic Rays and Stellar Nucleosynthesis…

  4. Big Bang… Cosmic Rays and Stellar Nucleosynthesis… …Neutron Capture and rp-process…

  5. Big Bang… Cosmic Rays and Stellar Nucleosynthesis… …Neutron Capture and rp-process… r-process

  6. S-process: Neutron capture slow compared to beta decay R-process: Neutron capture rapid compared to beta decay R-process peaks: Strontium ( A ~ 80) Xenon ( A ~ 130) Europium (A ~ 165, rare earth) Platinum ( A ~ 195) Neutron-Capture Nucleosynthesis Neutron Capture A(Z,N) + n  A(Z,N+1) + γ Beta Minus Decay A(Z,N)  A(Z+1,N-1) + υe + e-

  7. Neutrino Driven Wind

  8. Traditional Core-collapse Supernova Does Not Produce The r-process Active-Sterile Neutrino Oscillations Result In r-process Element Production Abundance Yields Phys.Rev. D73 (2006) 093007, J. Beun, G.C. McLaughlin, R. Surman, W.R. Hix

  9. Progressively Lower Electron Fractions Converge To A Single r-process Pattern Asymptotic Value Dependent on Fission Model Abundance: Fission Cycling

  10. Electron Fraction: Mean Neutrino Energy Variation of Neutrino and Anti-Neutrino Energies does not lead to neutron-rich environments

  11. Neutrino Reduction Necessary For Low Electron Fractions In The Core-Collapse Supernova Environment Electron Fraction: Neutrino Luminosity

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