Ge70(p,γ)As71 and Ge76(p,n)As76 cross sections for the astrophysical p process: Sensitivity of the optical proton potential at low energies

G. G. Kiss, Gy Gyürky, Z. Elekes, Zs Fülöp, E. Somorjai, T. Rauscher, M. Wiescher

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38 Citations (Scopus)

Abstract

The cross sections of the Ge70(p,γ)As71 and Ge76(p,n)As76 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 γ-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.

Original languageEnglish
Article number055807
JournalPhysical Review C - Nuclear Physics
Volume76
Issue number5
DOIs
Publication statusPublished - Dec 3 2007

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astrophysics
protons
cross sections
proton energy
reaction products
cyclotrons
accelerators
activation
energy
decay
radiation
predictions

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

Cite this

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abstract = "The cross sections of the Ge70(p,γ)As71 and Ge76(p,n)As76 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 γ-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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AU - Kiss, G. G.

AU - Gyürky, Gy

AU - Elekes, Z.

AU - Fülöp, Zs

AU - Somorjai, E.

AU - Rauscher, T.

AU - Wiescher, M.

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AB - The cross sections of the Ge70(p,γ)As71 and Ge76(p,n)As76 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 γ-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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