Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10723850 | Physics Letters B | 2009 | 5 Pages |
Abstract
The fusion excitation function of 48Ca + 48Ca has been measured above and well below the Coulomb barrier, thereby largely extending the energy range of a previous experiment down to very low cross sections. This system has a negative Q-value for compound nucleus formation. The fusion cross section decreases steadily below the barrier with no conspicuous change of slope below â300 μb. Coupled-channels calculations using a Woods-Saxon potential indicate that a large diffuseness parameter is needed to reproduce the sub-barrier cross sections. A close analogy with the case of 36S + 48Ca, with Q>0, is pointed out. The sign of the Q-value does not influence fusion cross sections down to the 300-600 nb level.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
A.M. Stefanini, G. Montagnoli, R. Silvestri, L. Corradi, S. Courtin, E. Fioretto, B. Guiot, F. Haas, D. Lebhertz, P. Mason, F. Scarlassara, S. Szilner,