The cross sections of the 117 Sn(α, γ ) 121 Te and 117 Sn(α, p) 120 Sb reactions have been measured in the effective center of mass energy from 11.5 to 14.6 MeV. Highly enriched self-supporting 117 Sn (90%) foils were bombarded with an α beam delivered by the Bucharest IFIN-HH tandem accelerator. The induced activity of 121 Te and 120 Sb was measured with two large-volume high-purity Ge detectors in close geometry to maximize the detector efficiency. The experimental cross section and astrophysical S factor are compared with statistical model predictions for different global α-nucleus optical potentials.
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