Trojan Horse estimate of bare nucleus astrophysical S(E)-factor for the 6Li(p,α)3He reaction and its astrophysical implications

Details Trojan Horse estimate of bare nucleus astrophysical S(E)-factor for the 6Li(p,α)3He reaction and its astrophysical implications Trojan Horse estimate of bare nucleus astrophysical S(E)-factor for the 6Li(p,α)3He reaction and its astrophysical implications

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...438..779p&link_type=abstract

Astronomy and Astrophysics, Volume 438, Issue 3, August II 2005, pp.779-784

Astronomy and Astrophysics

Astrophysics

10

Nuclear Reactions, Nucleosynthesis, Abundances

Scientific paper

The ^6Li(p,α)^3He bare nucleus cross-section at astrophysical energies has been indirectly measured in the framework of the Trojan-Horse Method, finding an agreement within the experimental errors with the results of data extrapolations from direct methods. This result is thus an independent check of the extrapolation method used until now. The method of measure is recalled and the results are shown with particular attention to the bare cross section value at the Gamow energy. The quoted agreement between direct and indirect methods is discussed in the context of the surface lithium abundances in stars. It is shown that the problem of stellar lithium abundances is not at the nuclear physics level but it is an astrophysics problem that requires improvements in our knowledge of the mixing mechanisms, the reduction of the uncertainties on the other (non-nuclear) physical inputs, and more precise observational data.

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