A new method for a consistent description of the structure of even-even and even-odd nuclei

When adapted to finite systems, Landau's theory of Fermi liquids encounters the problem of how to deal consistently with even-even and even-odd systems. It is shown here that it is necessary as well as possible to generalize Landau's concept by setting up a closed set of equations that describes both kinds of systems, with the totally irreducible part of the many-body T-matrix playing the role of the fundamental interaction. (4 refs).