G. J. Fu

Residual proton-neutron interactions and the

We investigate the correlation between integrated proton-neutron interactions obtained by using the up-to-date experimental data of binding energies and the product N{sub p}N{sub n} of valence proton number and valence neutron number with respect to the nearest doubly closed nucleus. We make corrections on a previously suggested formula for the integrated proton-neutron interaction. Our results demonstrate a nice, nearly linear, correlation between the integrated p-n interaction and N{sub p}N{sub n}, which provides us with a firm foundation of the applicability of the N{sub p}N{sub n} scheme to nuclei far from the stability line.

N_{\rm p} N_{\rm n}

The proton-neutron interaction between the last proton and the last two neutrons,

scheme

{V}_{1p\ensuremath{-}2n}

Nuclear mass relations based on systematics of proton-neutron interactions

, and that between the last two protons and the last neutron,

Predictions of unknown nuclear masses by local mass relations in terms of neutron-proton interactions

{V}_{2p\ensuremath{-}1n}

Nuclear binding energies and empirical proton-neutron interactions

, for nuclei with mass number

Volume and surface symmetry energy coefficients

A\ensuremath{\geqslant}60

Predictions of unknown masses and their applications

, are extracted by using experimental binding energies of neighboring nuclei. By using a simple function to describe

Spin-aligned isoscalar pair correlation in

{V}_{1p\ensuremath{-}2n}

^{96}

and