Dynamic stellar neutron capture nucleosynthesis: The need for more nuclear data for the s-process

Conference · Tue Jan 15 00:00:00 EST 1985 · AIP Conf. Proc.; (United States)

OSTI ID:5716925

Mathews, G J; Howard, W M; Takahashi, K; Ward, R A

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

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
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