Wang, N , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
部门归属:
Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; China Inst Atom Energy, Beijing 102413, Peoples R China; Natl Lab Heavy Ion Accelerator, Nucl Theory Ctr, Lanzhou 730000, Peoples R China; Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China
英文摘要:
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. (c) 2006 Elsevier B.V. All rights reserved.
