Study of the 7Be(α,γ)11C reaction with DRAGON for vp–process nucleosynthesis Conferences uri icon

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abstract

  • Abstract The production of the p–nuclei is one of the unsolved puzzles in nuclear astrophysics. A possible mechanism is the nucleosynthesis in the neutrino–driven winds of core–collapse supernovae (νp–process), but it carries uncertainties, mostly in the supernova dynamics and the nuclear physics input. The pp-chain breakout reaction 7Be(α,γ)11C, which occurs prior to the supernova explosion, was identified as an important link which can influence the nuclear flow of the z/p-process and the final abundances of the p-nuclei. Nevertheless, its reaction rate is poorly known over the relevant energy range (T=1.5-3 GK). To improve the 7Be(α,γ)11C rate for vp-process nucleosynthesis temperatures, the first measurement of the strengths of two important resonances with unknown strength was recently performed at TRIUMF. A radioactive 7Be beam (t1/2 = 53.24 d) beam and the DRAGON recoil separator were used. The experimental details and preliminary results for the resonance strengths will be discussed.

authors

  • Psaltis, Athanasios
  • Chen, Alan
  • Kroll, L
  • Liang, J
  • Connolly, DS
  • Davids, B
  • Hutcheon, DA
  • Lennarz, Annika
  • Ruiz, C
  • Williams, M
  • Greife, U
  • Karpesky, J
  • Lovely, M
  • Brune, C
  • Paneru, SN
  • Giri, R
  • Luo, M
  • Tenkila, G
  • Fallis, J
  • Marshall, C
  • Shotter, AC

publication date

  • October 1, 2020