The charge-dependent realistic nuclear Hamiltonian for a nucleus, composed
of neutrons and protons, can be successfully approximated by a charge-indep
endent one. The parameters of such a Hamiltonian, i.e., the nucleon mass an
d the NN potential, depend upon the mass number A, charge Z, and isospin qu
antum number T of state of the studied nucleus. [S0556-2813(99)03809-1].