Study of the 12C+12C fusion reactions near the Gamow energy

2007/02/09 by T. Spillane, F. Raiola, S. Zeng +8 · 1 citation
Physics and Astronomy · #nucl-ex

paper · pdf · doi:10.1103/physrevlett.98.122501

published as Phys.Rev.Lett.98:122501,2007 · 4 Pages, 4 figures, accepted for publication in Phys. Rev. Lett

arxiv created 2007/02/09 · arxiv updated 2009/12/01

Abstract

The fusion reactions 12C(12C,a)20Ne and 12C(12C,p)23Na have been studied from E = 2.10 to 4.75 MeV by gamma-ray spectroscopy using a C target with ultra-low hydrogen contamination. The deduced astrophysical S(E)* factor exhibits new resonances at E <= 3.0 MeV, in particular a strong resonance at E = 2.14 MeV, which lies at the high-energy tail of the Gamow peak. The resonance increases the present non-resonant reaction rate of the alpha channel by a factor of 5 near T = 8x10⁸ K. Due to the resonance structure, extrapolation to the Gamow energy E_G = 1.5 MeV is quite uncertain. An experimental approach based on an underground accelerator placed in a salt mine in combination with a high efficiency detection setup could provide data over the full E_G energy range.

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