- th / 9 90 80 22 v 2 5 A ug 1 99 9 A variational calculation of particle - antiparticle bound states in the scalar Yukawa model

- th / 9 70 80 32 v 1 1 8 A ug 1 99 7 Large - basis shell - model calculation of 10 C → 10 B Fermi matrix element

- th / 9 50 80 28 v 1 1 7 A ug 1 99 5 Multifragmentation calculated with relativistic forces

A saturating hamiltonian is presented in a relativisti-cally covariant formalism. The interaction is described by scalar and vector mesons, with coupling strengths adjusted to the nuclear matter. No explicit density dependence is assumed. The hamilto-nian is applied in a QMD calculation to determine the fragment distribution in O + Br collision at different energies (50 – 200 MeV/u) to test the...

- th / 9 90 30 24 v 2 2 2 M ar 1 99 9 Method of integral transforms for few – body reactions

The method of integral transforms is reviewed. In the framework of this method reaction observables are obtained with the bound–state calculation techniques. New developments are reported.

ar X iv : n uc l - th / 9 50 80 19 v 1 1 0 A ug 1 99 5 Instabilities in nuclei

The evolution of dynamical perturbations is examined in nuclear multifragmentation in the frame of Vlasov equation. Both plane wave and bubble type of perturbations are investigated in the presence of surface (Yukawa) forces. An energy condition is given for the allowed type of instabilities and the time scale of the exponential growth of the instabilities is calculated. The results are compare...

l - th / 9 30 80 09 v 1 6 A ug 1 99 3 Variational Methods for Nuclear Systems with Dynamical Mesons

We derive a model Hamiltonian whose ground state expectation value of any two-body operator coincides with that obtained with the Jastrow correlated wave function of the many-body Fermi system. Using this Hamiltonian we show that the variational principle can be extended to treat systems with dynamical mesons, even if in this case the concept of wave function looses its meaning.