Potential inversion with subbarrier fusion data revisited

Details Potential inversion with subbarrier fusion data revisited Potential inversion with subbarrier fusion data revisited

2007-06-18

arxiv.org/abs/0706.2526v1

Phys.Rev.C76:021601,2007

Physics

Nuclear Physics

Nuclear Theory

5 pages, 3 eps figures

Scientific paper

10.1103/PhysRevC.76.021601

We invert experimental data for heavy-ion fusion reactions at energies well below the Coulomb barrier in order to directly determine the internucleus potential between the colliding nuclei. In contrast to the previous applications of the inversion formula, we explicitly take into account the effect of channel couplings on fusion reactions, by assuming that fusion cross sections at deep subbarrier energies are governed by the lowest barrier in the barrier distribution. We apply this procedure to the $^{16}$O +$^{144}$Sm and $^{16}$O +$^{208}$Pb reactions, and find that the inverted internucleus potential are much thicker than phenomenological potentials. A relation to the steep fall-off phenomenon of fusion cross sections recently found at deep subbarrier energies is also discussed.

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