Alpha-induced reaction cross section measurements on 151Eu for the astrophysical γ-process

Gy Gyürky, Z. Elekes, J. Farkas, Zs Fülöp, Z. Halász, G. G. Kiss, E. Somorjai, T. Szücs, R. T. Güray, N. Özkan, C. Yalçin, T. Rauscher

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42 Citations (Scopus)


In order to extend the experimental database relevant for the astrophysical γ - process towards the unexplored heavier mass region, the cross sections of the 151Eu(α, γ )155Tb and 151Eu(a, n)154Tb reactions have been measured at low energies between 12 and 17 MeV using the activation technique. The results are compared with the predictions of statistical model calculations and it is found that the calculations overestimate the cross sections by about a factor of 2. Asensitivity analysis shows that this discrepancy is caused by the inadequate description of the α+nucleus channel. A factor of 2 reduction of the reaction rate of 151Eu(α, γ )155Tb in γ -process network calculations with respect to theoretical rates using the optical potential by McFadden and Satchler (1966 Nucl. Phys. 84 177) is recommended.

Original languageEnglish
Article number115201
JournalJournal of Physics G: Nuclear and Particle Physics
Issue number11
Publication statusPublished - Nov 2010

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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