Bulg. J. Phys. vol.43 no.3 (2016), pp. 203-214

Microscopic Optical Potential Description of Elastic Scattering and Breakup Reactions of Light Exotic Nuclei

V.K. Lukyanov1, E.V. Zemlyanaya1, K.V. Lukyanov1, A.N. Antonov2, D.N. Kadrev2, M.K. Gaidarov2, K. Spasova2,3
1Joint Institute for Nuclear Research, Dubna 141980, Russia
2Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia 1784, Bulgaria
3Ep. K. Preslavski University of Shumen, 9712 Shumen, Bulgaria
Abstract. The hybrid model of the microscopic optical potential (OP) is applied to calculate the 11Li+p, 10,11Be+p and 10,11Be+12C, 8B+12C, 8B+58Ni, and 8B+208Pb elastic scattering cross sections at energies E < 100 MeV/nucleon. Previously, we have performed studies of elastic scattering of 6He and 8He isotopes on protons and 12C target. The OPs contain the folding-model real part with the direct and exchange isoscalar and isovector terms included, while its imaginary part is derived within an approach to the high-energy approximation. The depths of the real and imaginary parts of OP are fitted to the elastic scattering data, being simultaneously adjusted to reproduce the true energy dependence of the corresponding volume integrals. In the calculations, microscopic density distributions of exotic projectiles were used, such as large-scale shell model (LSSM) densities of 11Li, densities of 10Be and 8B nuclei obtained within the quantum Monte Carlo model, generator coordinate method densities of 10,11Be, and three-cluster model densities of 8B. Also, the cluster models, in which 11Li consists of 2n-halo and the 9Li core having its own LSSM form of density and 11Be consists of a n-halo and the 10Be core, are adopted. Within the latter, we give predictions for the longitudinal momentum distributions of 9Li fragments produced in the breakup of 11Li at 62 MeV/nucleon on a proton target. It is shown that our results for the diffraction and stripping reaction cross sections in 11Be scattering on 9Be, 93Nb, 181Ta, and 238U targets at 63 MeV/nucleon are in a good agreement with the available experimental data. It is shown, in general, that this microscopic approach can be successfully applied to studies of exotic nuclei with a pronounced neutron- or proton-halo structure.

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