Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993nuas.symp...75b&link_type=abstract
"Nuclear Astrophysics, Proceedings of the 7th Workshop held 22-27 March 1993 at Ringberg Castle, Tegernsee,
Astronomy and Astrophysics
Astrophysics
Stellar Interiors: Nucleosynthesis, Stellar Interiors: Massive Stars, Nucleosynthesis: Heavy Elements
Scientific paper
The authors investigate the effects of new rates for the reactions 18O(α, γ)22Ne, 22Ne(α, γ)26Mg and 22Ne(α, n)25Mg on the s-process nucleosynthesis occuring in the helium burning core of massive stars. The increase of the destruction rate of 22Ne by α-particles as well as the increase of the ratio (α, n)/(α, γ), compared to previously used values, result in an increase of the neutron production in the helium convective core. The s-process is then more efficient and the production of the light s-elements Sr, Y and Zr is favoured. Consequently, the overproduction of Kr relative to Sr in particular, found with the previous rates, can be avoided with the new rates.
Baraffe Isabelle
El Eid Mounib F.
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