University of Hertfordshire

By the same authors

Abundance uncertainties obtained with the PIZBUIN framework for Monte Carlo reaction rate variations

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Documents

  • 1709.00690

    Accepted author manuscript, 961 KB, PDF document

  • T. Rauscher
  • N. Nishimura
  • G. Cescutti
  • R. Hirschi
  • A. St J. Murphy
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Original languageEnglish
Title of host publication14th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG2017
PublisherAmerican Institute of Physics Inc.
Volume1947
ISBN (Electronic)9780735416420
DOIs
Publication statusPublished - 25 Apr 2018
Event14th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG2017 - Daejeon, Korea, Republic of
Duration: 27 Jun 201730 Jun 2017

Conference

Conference14th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG2017
CountryKorea, Republic of
CityDaejeon
Period27/06/1730/06/17

Abstract

Uncertainties in nucleosynthesis models originating from uncertainties in astrophysical reaction rates were estimated in a Monte Carlo variation procedure. Thousands of rates were simultaneously varied within individual, temperature-dependent errors to calculate their combined effect on final abundances. After a presentation of the method, results from application to three different nucleosynthesis processes are shown: the γ-process and the s-process in massive stars, and the main s-process in AGB stars (preliminary results). Thermal excitation of nuclei in the stellar plasma and the combined action of several reactions increase the final uncertainties above the level of the experimental errors. The total uncertainty, on the other hand, remains within a factor of two even in processes involving a large number of unmeasured rates, with some notable exceptions for nuclides whose production is spread over several stellar layers and for s-process branchings.

ID: 14837749