Fusion dynamics around the Coulomb barrier
作者:
K. Hagino,
N. Rowley,
T. Ohtsuki,
M. Dasgupta,
J. O. Newton,
D. J. Hinde,
期刊:
AIP Conference Proceedings
(AIP Available online 1904)
卷期:
Volume 704,
issue 1
页码: 82-91
ISSN:0094-243X
年代: 1904
DOI:10.1063/1.1737099
出版商: AIP
数据来源: AIP
摘要:
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,37Cl +209Bi,45Sc +197Au, and59Co +181Ta. For the37Cl +209Bi and45Sc +197Au 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. © 2004 American Institute of Physics
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