Measurement of the (112)Sn(p, gamma)(113)Sb, (119)Sn(p,gamma)(120)Sb, and (96)Zr(p,gamma)(97)Nb Cross Sections and Astrophysical S-Factors at Low Energies

Astronomy and Astrophysics – Astrophysics

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Tin, Antimony, Zirconium-96, Niobium-97

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One of the least well understood processes of nucleosynthesis is the p-process. The best site for this process are still undetermined and many likely contributing cross sections have both been measured directly. This work presents experimental results Measurements were made of the (p, γ ) reaction cross sections for three previously unmeasured (p, γ ) reactions in an attempt to extend experimental knowledge of these reactions to a higher mass section of the nuclear chart. for three target nuclei: 96Zr, 112Sn, and 119Sn at the 11 MV FN Tandem Van de Graaff Accelerator at the University Notre Dame in South Bend, Indiana. Incident proton energies ranged from 2.8 MeV to 8.5 MeV. The astrophysical S-factors are also calculated. The cross section measurements and S-factors are compared to Hauser-Feshbach theoretical calculations using the NON-SMOKER simulation to judge the applicability of the Hauser-Feshbach formalism to these reactions.

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