Koval'chuk V. Diffractive interaction of nucleons and deuterons with nuclei at intermediate energies

The elastic scattering cross sections of neutrons and deuterons colliding with the nuclei have been calculating by using the proposed method where profile functions have been presented through the phase shifts computed from the hadron-nucleus interaction potentials. This method allows to satisfactorily, without any free fitting parameters, fit the experimental elastic scattering angular distributions both for the nucleon-nucleus reactions at 182 MeV up to 1 GeV with a set of medium and heavy targets, and for the deuteron-nucleus ones at 400 and 700 MeV on 40Ca and 58Ni. The found sensitivity of the cross sections to the nucleon-nucleus interaction parameters can be used for the model adjustment of nuclear structure and reaction mechanisms. It has been obtained the general expression for neutrons appearing in deuteron stripping reaction. The neutron polarization has been calculated as function of neutron releasing angle and its energy. It has been found for the target 12C that the polarization reaches 2 0-30% for small angles and incident deuteron energy near 600 MeV. The polarization does not equal zero only when the neutron impulse component before the collision that is collinear (or perpendicular) to incident deuteron impulse does not equal to zero either. The elastic scattering differential cross sections of 80 MeV deuterons which collide with 68Zn, 89Y, 120Sn, 208Pb are computed by using the method of removing the logarithmic divergences appearing in diffraction approach when the Coulomb interaction is taken into account. The influences of the nuclear surface diffuseness and deuteron wave function choice that are related to cross section values have been investigated too. The angular distributions of the calculated scattered deuterons satisfactorily fit the experimental data both for main diffraction maximum and for secondary maxima neighbourhoods.