The s-process in massive stars: The Shell C-burning contribution

M. Pignatari, R. Gallino, C. Baldovin, M. Wiescher, F. Herwig, A. Heger, M. Heil, F. Käppeler

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Abstract

In massive stars the s-process (slow neutron capture process) is activated at different temperatures, during He - burning and during convective shell C - burning. At solar metallicity, the neutron capture process in the convective C - shell adds a substantial contribution to the s - process yields made by the previous core He - burning, and the final results carry the signature of both processes. With decreasing metallicity, the contribution of the C - burning shell to the weak s - process rapidly decreases, because of the effect of the primary neutron poisons. On the other hand, also the s - process efficiency in the He core decreases with metallicity.

Original languageEnglish
Title of host publicationProceedings of Science
Subtitle of host publication9th International Symposium on Nuclear Astrophysics - Nuclei in the Cosmos, NIC 2006; Geneva; Switzerland; 25 June 2006 through 30 June 2006
Publication statusPublished - 1 Dec 2006
Externally publishedYes
Event9th International Symposium on Nuclear Astrophysics - Nuclei in the Cosmos, NIC 2006 - Geneva, Switzerland
Duration: 25 Jun 200630 Jun 2006

Publication series

NameProceedings of Science
PublisherScuola Internazionale Superiore di Studi Avanzati (S I S S A)
ISSN (Print)1824-8039

Conference

Conference9th International Symposium on Nuclear Astrophysics - Nuclei in the Cosmos, NIC 2006
CountrySwitzerland
CityGeneva
Period25/06/0630/06/06

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