Global features of proton-neutron interactions and symmetry energy

Details Global features of proton-neutron interactions and symmetry energy Global features of proton-neutron interactions and symmetry energy

1999-07-07

arxiv.org/abs/nucl-th/9907022v1

Prog.Theor.Phys. 106 (2001) 1179-1193

Physics

Nuclear Physics

Nuclear Theory

15 pages, 4 figures, submitted to Phys. Lett. B

Scientific paper

10.1143/PTP.106.1179

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.

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