期刊
NUCLEAR PHYSICS IN ASTROPHYSICS CONFERENCE (NPA VII)
卷 940, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1742-6596/940/1/012051
关键词
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资金
- BRIDGCE UK
- ERC [306901]
- EU [GA321263-FISH]
- UK STFC [ST/M000958/1]
- COSMOS (STFC DiRAC Facility) at DAMTP in University of Cambridge
- European Research Council (ERC) [306901] Funding Source: European Research Council (ERC)
The s-process in massive stars, producing nuclei up to A approximate to 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 metal poor 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 beta-decay.
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