Fusion cross sections at deep sub-barrier energies

K. Hagino, N. Rowley, and M. Dasgupta
Phys. Rev. C 67, 054603 – Published 9 May 2003
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Abstract

A recent publication reports that heavy-ion fusion cross sections at extreme sub-barrier energies show a continuous change of their logarithmic slope with decreasing energy, resulting in a much steeper excitation function compared with theoretical predictions. We show that the energy dependence of this slope is partly due to the asymmetric shape of the Coulomb barrier; that is, its deviation from a harmonic shape. We also point out that the large low-energy slope is consistent with the surprisingly large surface diffusenesses required to fit recent high-precision fusion data.

  • Received 12 February 2003

DOI:https://doi.org/10.1103/PhysRevC.67.054603

©2003 American Physical Society

Authors & Affiliations

K. Hagino1,2, N. Rowley3, and M. Dasgupta4

  • 1Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan
  • 2Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, F-91406 Orsay Cedex, France
  • 3Institut de Recherches Subatomiques, UMR7500, IN2P3-CNRS/Universtité Louis Pasteur, BP28, F-67037 Strasbourg Cedex 2, France
  • 4Department of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT0200, Australia

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Vol. 67, Iss. 5 — May 2003

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