Differences between stellar and laboratory reaction cross sections

T. Rauscher

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

3 Citations (Scopus)
130 Downloads (Pure)

Abstract

Nuclear reactions proceed differently in stellar plasmas than in the laboratory due to the thermal effects in the plasma. On one hand, a target nucleus is bombarded by projectiles distributed in energy with a distribution defined by the plasma temperature. The mostly relevant energies are low by nuclear physics standards and thus require an improved description of low-energy properties, such as optical potentials, required for the calculation of reaction cross sections. Recent studies of low-energy cross sections suggest the necessity of a modification of the proton optical potential. On the other hand, target nuclei are in thermal equilibrium with the plasma and this modifies their reaction cross sections. It is generally expected that this modification is larger for endothermic reactions. We show that there is a large number of exceptions to this rule.

Original languageEnglish
Title of host publicationNuclear Physics in Astrophysics IV (NPAIV 2009)
EditorsA. Formicola, C. Gustavino, M. Junker
Place of PublicationBristol
PublisherIOP Publishing Ltd.
Number of pages4
DOIs
Publication statusPublished - 2010
Event4th International Conference on Nuclear Physics in Astrophysics - Frascati, Italy
Duration: 8 Jun 200912 Jun 2009

Publication series

NameJournal of Physics Conference Series
Number1
Volume202
ISSN (Print)1742-6588

Conference

Conference4th International Conference on Nuclear Physics in Astrophysics
Country/TerritoryItaly
CityFrascati
Period8/06/0912/06/09

Keywords

  • FINITE NUCLEI
  • OPTICAL-MODEL
  • HARD-CORE INTERACTION

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