Physics
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008pun..conf..297h&link_type=abstract
PHYSICS OF UNSTABLE NUCLEI. Proceedings of the International Symposium on the ISPUN07. Held 3-7 July 2007 in Hoi An, Vietnam. Ed
Physics
1
Scientific paper
The reaction 13C(α,n)16O is considered as the main neutron source for s-process in low-mass asymptotic giant branch stars. At low energies of astrophysical interest (190 keV corresponding to temperature of 108 K), the contribution of the subthreshold state 6.356 MeV of 17O to the 13C(α,n)16O cross section should be taken into account. However, the results of previous studies of this contribution lead to different conclusions.
Hence, to further investigate the effect of this resonance, we performed a new precise measurement of the alpha spectroscopic factor, Sα, of the 6.356 MeV state using the transfer reaction 13C(7Li,t)17O at two different incident energies. A brief description of the experiment will be given. The measured angular distributions and the obtained spectroscopic factors will be presented as well as their impact on 13C(α,n)16O reaction rate.
Audouin L.
Beaumel D.
Descouvemont Pierre
Fortier S.
Gaudefroy L.
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