Nishimura, N, Hirschi, R and Rauscher, T (2018) Sensitivity to neutron captures and β -decays of the enhanced s-process in rotating massive stars at low metallicities. Journal of Physics: Conference Series, 940 (1). 012051. ISSN 1742-6596

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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.

Item Type: Article
Additional Information: © IOP Publishing. This is the final published version of the article (version of record). It first appeared online via IOP at - please refer to any applicable terms of use of the publisher.
Uncontrolled Keywords: physics, astronomy
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Related URLs:
Depositing User: Symplectic
Date Deposited: 13 Feb 2018 16:02
Last Modified: 14 Feb 2018 14:02

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