The object of our research is the microscopic dynamics of systems of A nucleons (A < 10). To this end we study electromagnetic break up cross sections for real and virtual photons.

For the classical few-body systems () calculations with realistic interactions are performed. In particular we study  details of the NN interaction, three-body forces and subnuclear degrees of freedom. The final aim is to explore the limits of the non relativistic quantum theory with classical degrees of freedom (nucleons, mesons, isobars) for nuclear systems at low and intermediate energies.

For nuclei with A>4 we are presently carrying out microscopic calculations with semirealistic interactions, where all nucleon degrees of freedom are explicitly taken into account. In this way we hope to go towards a microscopic view of collective aspects in nuclear physics.

In order to perform rigorous microscopic calculations of inelastic reactions one needs an exact description of the generally complicated final state wave function. This difficult problem can be solved in an elegant way with the Lorentz Integral Transform Method (V.D. Efros, W. Leidemann, G. Orlandini, Phys. Lett. B338 (1994) 130). For  we use this powerful method to calculate the electromagnetic cross sections. First important applications of the method are found in the following two publications: V.D. Efros, W. Leidemann, G. Orlandini, Phys. Rev. Lett. 78 (1997) 432;  V.D. Efros, W. Leidemann, G. Orlandini, Phys. Rev. Lett. 78 (1997), 4015.