The role of fission in the r-process

G. Martinez-Pinedo, D. Mocelj, N. T. Zinner, A. Kelic, K. Langanke, I. Panov, B. Pfeiffer, T. Rauscher, K.-H. Schmidt, Friedrich-Karl Thielemann

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

56 Citations (Scopus)

Abstract

We have developed a full set of fission rates that include spontaneous fission, neutron-induced fission, beta-delayed fission and, neutrino-induced fission, that are supplemented with realistic distributions of fission yields. Using this new input data we have carried out r-process calculations assuming adiabatic expansions that mimic the conditions achieved in the supernova neutrino driven wind. We have explored the sensitivity of the final abundances to different mass models. The resulting abundance distribution turns out to be very sensitive to the strength of the N = 82 shell gap far from stability. Mass models with a strong shell gap converge to an r-process distribution that is independent of the initial conditions once fission sets in. This convergence is not achieved in mass models with a quenched N = 82 shell gap. (c) 2007 Published by Elsevier B.V.

Original languageEnglish
Title of host publicationProgress in Particle and Nuclear Physics
PublisherElsevier
Pages199-205
Number of pages7
DOIs
Publication statusPublished - 2007
EventInternational Workshop on Nuclear Physics/28th Course Radioactive Beams, Nuclear Dynamics and Astrophysics - Erice, Italy
Duration: 16 Sept 200624 Sept 2006

Publication series

NameProgress in Particle and Nuclear Physics
Number1
Volume59
ISSN (Print)0146-6410

Conference

ConferenceInternational Workshop on Nuclear Physics/28th Course Radioactive Beams, Nuclear Dynamics and Astrophysics
Country/TerritoryItaly
CityErice
Period16/09/0624/09/06

Keywords

  • CHRONOMETERS
  • HEAVY ELEMENT SYNTHESIS
  • CS 31082-001
  • PROCESS NUCLEOSYNTHESIS
  • METAL-POOR STARS
  • r-process nucleosynthesis
  • nuclei far from stability
  • MODEL
  • RICH
  • NEUTRINO-DRIVEN WINDS
  • NUCLEAR-MASS FORMULA
  • fission
  • ABUNDANCES

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