Nuclear physics uncertainties in neutrino-driven, neutron-rich supernova ejecta

J. Bliss, A. Arcones, F. Montes, and J. Pereira
Phys. Rev. C 101, 055807 – Published 28 May 2020

Abstract

Background: Neutrino-driven ejecta in core collapse supernovae (CCSNe) offer an interesting astrophysical scenario where lighter heavy elements between Sr and Ag can be synthesized. Previous studies emphasized the important role that (α,n) reactions play in the production of these elements, particularly in neutron-rich and alpha-rich environments.

Purpose: In this paper, we have investigated the sensitivity of elemental abundances to specific (α,n) reaction-rate uncertainties under different astrophysical conditions.

Method: The abundances of lighter heavy elements were calculated with a reaction network under different astrophysical conditions. (α,n) reaction rates were varied within their theoretical uncertainty by using a Monte Carlo approach.

Results: The most important (α,n) reaction affecting the nucleosynthesis of lighter heavy nuclei were identified for 36 representative conditions of CCSNe neutrino-driven winds.

Conclusions: Experimental studies of these reactions will reduce the nucleosynthesis uncertainties and make it possible to use observations to understand the origin of lighter heavy elements and the astrophysical conditions where they are formed.

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  • Received 25 December 2019
  • Accepted 11 May 2020

DOI:https://doi.org/10.1103/PhysRevC.101.055807

©2020 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & AstrophysicsNuclear Physics

Authors & Affiliations

J. Bliss1, A. Arcones1,2, F. Montes3,4, and J. Pereira3,4

  • 1Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstr. 2, Darmstadt 64289, Germany
  • 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, Darmstadt 64291, Germany
  • 3National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
  • 4Joint Institute for Nuclear Astrophysics, 640 South Shaw Lane, East Lansing, Michigan 48824, USA

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Issue

Vol. 101, Iss. 5 — May 2020

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