Low-Energy Direct Capture in the 16O(alpha,gamma)20Ne Reaction

Abstract

The cross section of the 16O(a,g)20Ne capture reaction is analyzed at low energies where the direct capture mechanism is dominant. For temperatures below T9 = 0.2 the resulting astrophysical reaction rate is about a factor of two higher than in a recent compilation whereas the energy dependence of the astrophysical S-factor and the branching ratios to the 20Ne bound states are very similar to previous calculations. The validity of the widely used detailed balance theorem for the inverse 20Ne(g,a)16O photodisintegration rate is confirmed for the special case of high-lying first excited states.

arXiv comment11 pages, 4 figures, Phys. Rev. C, accepted for publication

References in corpus (5)

• Experimental simulation of a stellar photon bath by bremsstrahlung: the astrophysical $\gamma$-process
• Alpha scattering and capture reactions in the A = 7 system at low energies
• Predicted cross sections for photon-induced particle emission
• Low-Energy Direct Capture in the 8Li(n,gamma)9Li and 8B(p,gamma)9C Reactions
• Non-explosive hydrogen and helium burnings: Abundance predictions from the NACRE reaction rate compilation

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