Fusion dynamics around the Coulomb barrier
Abstract
We perform exact coupled-channels calculations, taking into account properly the effects of Coulomb coupling and the finite excitation energy of collective excitations in the colliding nuclei, for three Fm formation reactions, Cl + Bi, Sc + Au, and Co + Ta. For the Cl + Bi and Sc + Au reactions, those calculations well reproduce the experimental total fission cross sections, and a part of the extra-push phenomena can be explained in terms of the Coulomb excitations to multi-phonon states. On the other hand, for the heaviest system, the deep-inelastic collisions become much more significant, and the fission cross sections are strongly overestimated. We also discuss the surprisingly large surface diffuseness parameters required to fit recent high-precision fusion data for medium-heavy systems, in connection with the fusion supression observed in massive systems.
Cite
@article{arxiv.nucl-th/0311008,
title = {Fusion dynamics around the Coulomb barrier},
author = {K. Hagino and N. Rowley and T. Ohtsuki and M. Dasgupta and J. O. Newton and D. J. Hinde},
journal= {arXiv preprint arXiv:nucl-th/0311008},
year = {2009}
}
Comments
10 pages, 6 ps figures. Uses aipxfm.sty. A talk given at the Tours Symposium on Nuclear Physics V, August 26 - 29, 2003, Tours, France