Dynamic stellar neutron capture nucleosynthesis: The need for more nuclear data for the s-process
We summarize results from a detailed parameter study of the s-process in models which produce an exponential distribution of exposures by sequential irradiations and dredge up in the stellar environment. The calculations are based on a complete network of measured and calculated neutron capture and beta-decay rates as well as estimates for their temperature dependence. In the framework of these models we identify and systematically vary the astrophysical variables which affect the observed solar-system sigmaN (cross section times abundance) curve. Constraints are placed on the s-process neutron exposure and flux as well as the temperatures, densities, neutron pulse shape and inter-pulse period. The results also highlight important needs for better nuclear data in various mass regions.
- Research Organization:
- Lawrence Livermore National Laboratory, Livermore, CA 94550
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5716925
- Report Number(s):
- CONF-840906-
- Journal Information:
- AIP Conf. Proc.; (United States), Vol. 125:1; Conference: Capture gamma-ray spectroscopy conference, Knoxville, TN, USA, 10 Sep 1984
- Country of Publication:
- United States
- Language:
- English
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Parametric study of dynamic s-process neutron-capture nucleosyntheses: nuclear data needs
Parametric study of dynamic s-process neutron-capture nucleosynthesis: nuclear data needs
Related Subjects
GENERAL PHYSICS
NEUTRON REACTIONS
CAPTURE
S PROCESS
MULTI-PARAMETER ANALYSIS
BETA DECAY
CROSS SECTIONS
STAR MODELS
BARYON REACTIONS
DECAY
HADRON REACTIONS
MATHEMATICAL MODELS
NUCLEAR REACTIONS
NUCLEON REACTIONS
STAR EVOLUTION
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources