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How does fusion hindrance show up in medium-light systems? The case of <sup>48</sup>Ca +<sup> 48</sup>Ca
Journal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Date Issued
2009-08-17
Author(s)
Stefanini, A. M.
Montagnoli, G.
Silvestri, R.
Corradi, L.
Courtin, S.
Fioretto, E.
Guiot, B.
Haas, F.
Lebhertz, D.
Mason, P.
Scarlassara, F.
Szilner, S.
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
. 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
, is pointed out. The sign of the Q-value does not influence fusion cross sections down to the 300–600 nb level.
. 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
, is pointed out. The sign of the Q-value does not influence fusion cross sections down to the 300–600 nb level.
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