20 de junho de 2018 | Estruturas Nucleares e Reações, Publicações
E. N. Cardozo, J. Lubian, R. Linares, F. Cappuzzello, D. Carbone, M. Cavallaro, J. L. Ferreira, A. Gargano, B. Paes, G. Santagati
Phys. Rev. C 97, 064611
20/06/2018
Abstract
In this work we study the simultaneous and sequential two-neutron transfer mechanisms to the 28Sinucleus induced by (t,p) and (18O,16O) reactions. New experimental cross sections for the 28Si(18O,16O)30Si reaction at 84 MeV are also presented. Direct reaction calculations are carried out within the exact finite range coupled reaction channel, for the simultaneous transfer of the two-neutron cluster, and the second-order distorted wave Born approximation, for the sequential transfer. Two different models are considered to describe the two-neutron cluster. The spectroscopic information was obtained from a shell-model calculation with a psdmod interaction for the target overlaps where the 1p3/2, 1p1/2, 1d3/2, 1d5/2, and 2s1/2 orbitals are included as valence subspace. We show that simultaneous and sequential two-neutron transfers are competing mechanisms for the population of the ground state in 30Si. A systematic analysis of the two-neutron transfer induced by the (18O,16O)reaction indicates that the static deformation of target nuclei impacts the two-neutron transfer mechanism.