Origin of a maximum of the astrophysical S factor in heavy-ion fusion reactions at deep subbarrier energies

K. Hagino, A. B. Balantekin, N. W. Lwin, Ei Shwe Zin Thein

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1 Citation (Scopus)

Abstract

The hindrance phenomenon of heavy-ion fusion cross sections at deep subbarrier energies often accompanies a maximum of an astrophysical S factor at a threshold energy for fusion hindrance. We argue that this phenomenon can naturally be explained when the fusion excitation function is fitted with two potentials, with a larger (smaller) logarithmic slope at energies lower (higher) than the threshold energy. This analysis clearly suggests that the astrophysical S factor provides a convenient tool to analyze the deep subbarrier hindrance phenomenon, even though the S factor may have a strong energy dependence for heavy-ion systems unlike that for astrophysical reactions.

Original languageEnglish
Article number034623
JournalPhysical Review C
Volume97
Issue number3
DOIs
Publication statusPublished - 2018 Mar 29

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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