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The s-process Nucleosynthesis

Published online by Cambridge University Press:  23 December 2005

S. Goriely  and
L. Siess
S. Goriely
Affiliation:
Institut d'Astronomie et d'Astrophysique, ULB, Campus de la Plaine, CP226, B-1050 Brussels, Belgium email: [email protected] and [email protected]
L. Siess
Affiliation:
Institut d'Astronomie et d'Astrophysique, ULB, Campus de la Plaine, CP226, B-1050 Brussels, Belgium email: [email protected] and [email protected]
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Abstract

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Theoretical as well as observational aspects of the s-process nucleosynthesis are reviewed. The classical site-independent s-process model as well as the s-process in massive stars are shortly described. A special attention is paid to the nucleosynthesis taking place in AGB stars and the extra-mixing invoked to explain the production of neutrons in the C-rich layers during the interpulse. We also discuss the nucleosynthesis found in hot AGB stars for which the s-process during the interpulse phase is inhibited, but the one resulting from the large temperatures in the thermal pulse is boosted. We comment on the uncertainties affecting our understanding of the physical mechanisms responsible for a successful s-process. Finally, various types of spectroscopic observations of s-process elements are discussed.

Keywords

Nuclear reactionsnucleosynthesisabundancesstars: AGB and post-AGB
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Symposium S228: From Lithium to Uranium: Elemental Tracers of Early Cosmic Evolution , May 2005 , pp. 451 - 460
Copyright
© 2005 International Astronomical Union