Microscopic analysis of quasielastic scattering and breakup reactions of the neutron-rich nuclei Be12,14

Abstract

A microscopic analysis of the optical potentials (OPs) and cross sections of quasielastic scattering of 12,14 Be on 12 C at 56 MeV/nucleon and on protons at energy near 700 MeV is carried out. For lower energy scattering the real part of the OP is calculated by using of double-folding procedure accounting for the anti-symmetrization effects, while the imaginary part is obtained on the base of the high-energy approximation (HEA). The HEA is also applied to the calculations of both real and imaginary OPs when solving the relativistic equation for the high-energy proton-nucleus elastic scattering. The neutron and proton density distributions computed in different microscopic models for 12 Be and 14 Be are used. In the present hybrid model of the optical potential the only free parameters are the depths of the real and imaginary parts of OP obtained by fitting the experimental data. The role of the inelastic scattering channel to the first excited 2 + and 3 − states in 12 C when calculating the quasielastic cross sections, as well as the modified density of the 12 C target accounting for the surface effects are studied. In addition, the cluster model, in which 14 Be consists of a 2n-halo and the 12 Be core, is applied to calculate the cross sections of diffraction breakup and stripping reactions in 14 Be+ 12 C scattering and longitudinal momentum distributions of 12 Be fragments at energy of 56 MeV/nucleon. A good agreement of the theoretical results with the available experimental data of both quasielstic scattering and breakup processes is obtained.

Detailed analysis for 6Li+40Ca elastic scattering using different potentials

“…The data were also reanalyzed using the microscopic Sao Paulo potential, and the two considered potentials were observed to generate similar data predictions over the measured angular ranges. The fully microscopic optical potential calculations have been widely applied for investigating the elastic scattering of weakly-bound light exotic nuclei on protons and complex targets at energies less than 100 MeV/u [20][21][22][23][24][25].…”

Double-Folding Nucleus-Nucleus Optical Potential: Parallel MPI and OpenMP Implementations

“…It is intensively used within the hybrid model of OP [2] combining the DFM-based real part of OP with the highenergy approximation [4] for calculating its imaginary part. Such approach, in spite of the significant computer time for the DFM OP calculation, is successfully used in studies of nuclear interactions at energies of 10-100 MeV/nucleon (see, e.g., [5] and references therein).…”