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.
|Number of pages||4|
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 31 Jan 2018|
|Event||Nuclear Physics in Astrophysics Conference (NPA VII) - The Royal York Hotel, York, United Kingdom|
Duration: 18 May 2015 → 22 May 2015