Study of 9Be+12C elastic scattering at energies near the Coulomb barrier

In this work, angular distribution measurements for the elastic channel were performed for the 9Be+12C reaction at the energies ELab=13.0, 14.5, 17.3, 19.0 and 21.0 MeV, near the Coulomb barrier. The data have been analyzed in the framework of the double folding S\~ao Paulo potential. The experimental elastic scattering angular distributions were well described by the optical potential at forward angles for all measured energies. However, for the three highest energies, an enhancement was observed for intermediate and backward angles. This can be explained by the elastic transfer mechanism. Keywords: 9Be+12C, Elastic Scattering, S\~aoo Paulo Potential

Energy dependence of the 7Li + 16O interaction

Data of the 7 Li + 16O elastic and inelastic scattering at Ec.m. = 6.26 - 34.78 MeV were analyzed within the optical model (OM) and coupled-reaction-channels method. The elastic and inelastic scattering as well as the reorientation of 7 Li were included in the coupled-channels-scheme. The contributions of the 7 Li reorientation to the elastic scattering data was estimated. The energy dependence of the 7 Li + 16O OM parameters was deduced. The dispersion relation between the real and imaginary parts of the OM potential was taken into account

Global potential of interaction for 16O + 12C- and 12C + 12C-diffractive scattering in the wide energy range

Detailed study of the behavior of experimental differential cross sections for the 16О + 12С-, 12С + 12С-elastic scatte¬ring in the energy range from 1 to 200 MeV/nucleon have been carried out. It is found that differential cross sections in the range of transfer momentum from 0 to 3-4 fm-1 shows the diffraction character for scattering in the overall energy range. The behavior features of the allocations of the first eight diffraction maxima and minima as well values of cross-sections in the maxima at the change of the interaction energy have been analyzed. It has been received energy-dependent optical potentials of the interaction for examines systems at the full range of energies. The obtained potentials describe the available experimental data satisfactorily and reproduce typical features of diffractive scattering cross sections

Energy dependence of the potential for interaction of 16O ions with 12C nuclei

The moment of inertia for collective rotation is derived analytically for the harmonic-oscillator Hamiltonian within the cranking model for any rotation frequency and at finite temperature. Semiclassical shell-structure moments of the inertia are obtained in terms of the free-energy shell corrections through the rigid-body inertia of the statistically equilibrium rotation of a heated Fermi system by using the periodic-orbit theory. Their analytical structure in terms of the equatorial and 3-dimensional periodic orbits for the axially-symmetric harmonic-oscillator potential is in perfect agreement with quantum results for critical deformations and temperatures

Mechanisms of 13C(11B, 7Li)17O reaction at the 11B ion energy 45 MeV

Reaction 13C(11B, 7Li)17O at the energy Еlab(11B) = 45 MeV for the ground and excited states of the 7Li and 17O nuclei was studied. The reaction experimental data were analyzed within the coupled-reaction-channels method (CRC). The 13C + 11B elastic scattering channel and one- and two-step reactions transferring nucleons and clus-ters were included in the coupling scheme. The spectroscopic amplitudes of nucleons and clusters needed for the CRC-calculations were computed within the translationally invariant shell model (TISM). The Woods-Saxon (WS) potential was used for the entrance reaction channel with the parameters deduced from the CRC-analysis of the 11B + 13C elastic scattering experimental data when the potential WS and the folding-potential (DF) with im-aginary part, parameters of which were deduced from the fitting of the CRC cross sections to the 13C(11B, 7Li)17O reaction experimental data, were used for the exit 7Li + 17O reaction channel. The parameters of the imaginary WS-potential were deduced in the same way. The parameters of the real part of this potential were obtained by fitting it to the peripheral region of the DF-potential. Isotopic differences of the 13C(11B, 7Li)17O reaction cross sections using the parameters of 7Li + 17O, 7Li + 16О and 7Li + 18O interaction for the exit reaction channel were observed