Revision of the derivation of stellar rates from experiment and impact on Eu s-process contributions

6th Nuclear Physics in Astrophysics

物理学;天文学

Rauscher, T.^1,2,3

Centre for Astrophysics Research, School of Physics, Astronomy and Mathematics, University of Hertfordshire, Hatfield

AL10 9AB, United Kingdom^1

Institute of Nuclear Research (ATOMKI), POB 51, Debrecen

H-4001, Hungary^2

Department of Physics, University of Basel, Basel

4056, Switzerland^3

关键词: Abundance ratios;    AGB stars;    Experimental errors;    Neutron capture;    S-process;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/665/1/012024/pdf
DOI  :  10.1088/1742-6596/665/1/012024

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

A new, general formalism to include experimental data in revised stellar rates is discussed, containing revised uncertainties. Application to the s-process shows that the actual uncertainties in the neutron capture rates can be larger than would be expected from the experimental errors alone. As a specific example for how astrophysical conclusions can depend on the approach selected to derive stellar rates, the151Eu/(151Eu+153Eu) abundance ratio from AGB star models is presented. Finally, a recommended workflow for the derivation of stellar rates from experiment is laid out.