%0 Journal Article
%T Global features of proton-neutron interactions and symmetry energy
%A K. Kaneko
%A M. Hasegawa
%J Physics
%D 1999
%I arXiv
%R 10.1143/PTP.106.1179
%X We study global features of proton-neutron (p-n) interactions and symmetry energy over a wide range of nuclei, using a schematic model interaction with four forces proposed recently. Calculations are performed by the BCS approximation in N,Z=20-50 and N,Z=50-82 regions. The experimental double differences of binding energies and symmetry energy are reproduced quite well. It is shown that the isoscalar p-n interactions with all J are indispensable for explaining the binding energies of not only $N\approx Z$ but also N>Z nuclei in the A=40-160 region.
%U http://arxiv.org/abs/nucl-th/9907022v1