Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2005-09-26
Nucl.Phys. A768 (2006) 80-98
Physics
Nuclear Physics
Nuclear Theory
28 pages, 13 figures and 2 tables. accepted by Nucl. Phys. A
Scientific paper
10.1016/j.nuclphysa.2006.01.011
The Skyrme energy density functional has been applied to the study of heavy-ion fusion reactions. The barriers for fusion reactions are calculated by the Skyrme energy density functional with proton and neutron density distributions determined by using restricted density variational (RDV) method within the same energy density functional together with semi-classical approach known as the extended semi-classical Thomas-Fermi method. Based on the fusion barrier obtained, we propose a parametrization of the empirical barrier distribution to take into account the multi-dimensional character of real barrier and then apply it to calculate the fusion excitation functions in terms of barrier penetration concept. A large number of measured fusion excitation functions spanning the fusion barriers can be reproduced well. The competition between suppression and enhancement effects on sub-barrier fusion caused by neutron-shell-closure and excess neutron effects is studied.
Li Zhuxia
Liu Min
Wang Ning
Wu Xizhen
Zhao Enguang
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