Waiting point approximation and canonical multi-event r-process revisited.
Abstract
The validity of the waiting point approximation on which canonical r-process calculations are commonly based is studied in detail in the astrophysical conditions of relevance by comparing its abundance predictions with those derived numerically from a full network calculation. Our network computations are also used to analyze the sensitivity of the derived r-process abundances to the astrophysical conditions of temperature, neutron density and timescales. When considering an optimized superposition of a large number of astrophysical events, it is shown that the solar system r-process abundances can be reproduced quite well. The sensitivity of our results to the nuclear physics uncertainties that affect the nuclear mass or level density predictions is also discussed.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- August 1996
- Bibcode:
- 1996A&A...312..327G
- Keywords:
-
- NUCLEAR REACTIONS;
- NUCLEOSYNTHESIS;
- STARS: SUPERNOVAE;
- SOLAR SYSTEM: GENERAL