edoc

Sensitivity to neutron captures and beta-decays of the enhanced s-process in rotating massive stars at low metallicities

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

[img]
Preview
PDF - Published Version
Available under License CC BY (Attribution).

999Kb

Official URL: https://edoc.unibas.ch/64227/

Downloads: Statistics Overview

Abstract

The s-process in massive stars, producing nuclei up to A ap 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 beta-decay.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Rauscher, Thomas
Item Type:Conference or Workshop Item, refereed
Conference or workshop item Subtype:Conference Paper
Publisher:IOP Publishing
ISSN:1742-6588
e-ISSN:1742-6596
Note:Publication type according to Uni Basel Research Database: Conference paper
Language:English
Identification Number:
Last Modified:28 May 2018 07:02
Deposited On:28 May 2018 07:01

Repository Staff Only: item control page