University of Hertfordshire

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  • 1802.05837

    Accepted author manuscript, 1 MB, PDF document

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Original languageEnglish
Article number012051
JournalJournal of Physics: Conference Series
Journal publication date31 Jan 2018
Volume940
Issue1
DOIs
Publication statusPublished - 31 Jan 2018

Abstract

The s-process in massive stars, producing nuclei up to A ≈ 90, has a different behaviour at low metallicity if stellar rotation is significant. This enhanced s-process is distinct from the s-process in massive stars around solar metallicity, and details of the nucleosynthesis are poorly known. We investigated nuclear physics uncertainties in the enhanced s-process in metalpoor stars within a Monte-Carlo framework. We applied temperature-dependent uncertainties of reaction rates, distinguishing contributions from the ground state and from excited states. We found that the final abundance of several isotopes shows uncertainties larger than a factor of 2, mostly due to the neutron capture uncertainties. A few nuclei around branching points are affected by uncertainties in the β-decay.

ID: 13559042