Spectral Functions and Properties of Nuclear Matter

The Green’s function method in the Kadanoff-Baym version provides a basic theory for nuclear dynamics which is applicable also to nonzero temperature and to nonequilibrium systems. At the same time, it maintains the basic many-body techniques of the Brueckner theory that makes reasonable a comparison of the numerical results of the two methods for equilibrium systems. The correct approximation to the spectral function which takes into account the widths of energy levels is offered and discussed, and the comparison of the values of binding energy in the two methods is produced.

EXACT CALCULATION OF THE DIRECT PART OF THE NUCLEON–NUCLEUS SPIN-ORBIT POTENTIAL IN BRUECKNER THEORY

We have shown that the commonly used series expansion given by Greenlees et al. and Scheerbaum for calculating the spin-orbit potential is not rapidly convergent and that exact calculation of the dominant direct part can be easily done. Our exact calculation of the microscopic optical potential for the scattering of protons from 40 Ca and 208 Pb at 65 MeV and 200 MeV shows that the direct part is substantially different from the results using series expansion. Our results show that the spin-orbit potential affects the cross-section even at intermediate angles specially at high energies. The results presented here have direct application for calculating spin-orbit potential of all strongly interacting Fermionic probes.

BRUECKNER-AMD STUDY OF LIGHT NUCLEI

We applied the Brueckner theory to the Antisymmetrized Molecular Dynamics (AMD), and show the reliability of the AMD calculations based on realistic nuclear interactions. Focusing our interest on a structure dependence of the tensor force, we investigate the α-α clusterization of 8 Be .