  The formalism of the continuum random-phase approximation theory which
treats, without ap- proximations, the continuum part of the single-particle
spectrum, is extended to describe charge- exchange excitations. Our approach is
self-consistent, meaning that we use a unique, finite-range, interaction in the
Hartree-Fock calculations which generate the single-particle basis and in the
con- tinuum random-phase approximation which describes the excitation. We study
excitations induced by the Fermi, Gamow-Teller and spin-dipole operators in
doubly magic nuclei by using four Gogny- like finite-range interactions, two of
them containing tensor forces. We focus our attention on the importance of the
correct treatment of the continuum configuration space and on the effects of
the tensor terms of the force.1
