Cross sections for α-particle induced reactions on Sn115,116 around the Coulomb barrier

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3H-, 3He-, And 4He-Induced Reactions, 90<=A<=149, Nucleosynthesis In Novae, Supernovae, And Other Explosive Environments, Statistical Theory And Fluctuations

Scientific paper

The cross sections of the Sn115(α,γ)Te119, Sn115(α,n)Te118, and Sn116(α,n)Te119 reactions (both on ground and isomeric states) have been measured at effective center-of-mass energies from 9.3 to 14.8 MeV. During a first experiment, enriched self-supporting Sn115 (51.2%) + Sn116 (24.4%) foils were bombarded with an α beam delivered by the Bucharest IFIN-HH Tandem Accelerator. In a second experiment, a highly enriched Sn116 target was irradiated in order to disentangle the experimental cross section contributions due to Sn115(α,γ)Te119 and Sn115(α,n)Te118 reactions obtained in the first measurement. The beam-induced activity was measured with two large volume HPGe detectors in close geometry. The experimental results were compared with theoretical predictions obtained in the framework of the statistical model.

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