I. Bentley, S. Frauendorf
The linear term proportional to |N - Z| in the nuclear symmetry energy
(Wigner energy) is obtained in the framework of a model that uses isovector
pairing on single particle levels from a deformed potential combined with a T 2
interaction. The pairing correlations are calculated by numerical
diagonalization of the pairing Hamiltonian acting on several levels nearest the
Fermi surface. The experimental binding energies of nuclei with N \approx Z are
well reproduced without introducing new parameters.
View original:
http://arxiv.org/abs/1202.2795
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