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arXiv · 0711.1079

70Ge(p,gamma)71As and 76Ge(p,n)76As cross sections for the astrophysical p process: sensitivity of the optical proton potential at low energies

G. G. Kiss·Gy. Gyurky·Z. Elekes·Zs. Fulop·E. Somorjai·T. Rauscher·M. Wiescher
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Abstract

The cross sections of the 70Ge(p,gamma)71As and 76Ge(p,n)76As reactions have been measured with the activation method in the Gamow window for the astrophysical p process. The experiments were carried out at the Van de Graaff and cyclotron accelerators of ATOMKI. The cross sections have been derived by measuring the decay gamma-radiation of the reaction products. The results are compared to the predictions of Hauser-Feshbach statistical model calculations using the code NON-SMOKER. Good agreement between theoretical and experimental S factors is found. Based on the new data, modifications of the optical potential used for low-energy protons are discussed.

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G. G. Kiss, Gy. Gyurky, Z. Elekes, Zs. Fulop, E. Somorjai, T. Rauscher, M. Wiescher. 2007-11-07. 70Ge(p,gamma)71As and 76Ge(p,n)76As cross sections for the astrophysical p process: sensitivity of the optical proton potential at low energies. https://doi.org/10.1103/physrevc.76.055807

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