Quasi-elastic barrier distribution of theO17 + 

Abstract

The quasi-elastic excitation function for the 17 O + 64 Zn system was measured at energies near and below the Coulomb barrier, at the backward angle θ lab = 161 • . The corresponding quasi-elastic barrier distribution was derived. The excitation function for the neutron stripping reactions was also measured, at the same angle and energies, and the experimental values of the spectroscopic factors were deduced by fitting the data. A reasonably good agreement was obtained between the experimental quasi-elastic barrier distribution with the coupled-channel calculations including a very large number of channels. Of the channels investigated, three dominated the coupling matrix: two inelastic channels, 64 Zn(2 + 1 ) and 17 O(1/2 + ), and one-neutron transfer channel, particularly the first one. On the other hand, a very good agreement is obtained when we use a nuclear diffuseness for the 17 O nucleus larger than the one for 16 O. We verify that quasi-elastic barrier distribution is a sensitive tool for determining nuclear matter diffuseness.

Near-barrier quasielastic scattering as a sensitive tool to derive nuclear matter diffuseness

“…In a recent paper, we presented a method that, taking advantage of the strong influence of the interaction potential * crema@if.usp.br on the quasielastic barrier distribution (QEBD), could derive the NMD of the 17 O nucleus [10]. Instead of using optical potentials, double-folding potentials were used as the real part of interaction potentials because these potentials are explicitly dependent on the charge and matter densities of each interacting nucleus.…”

Interference effects between direct and sequential processes in the (18O,16O) reaction

“…The matter diffuseness for the 18 O and 17 O nuclei was taken by Refs. [15,16]. The imaginary part of the optical potential was built with the SPP shape.…”

Quasi-elastic backscattering of 6,7Li on light, medium and heavy targets at near- and sub-barrier energies

“…For further understanding this subject and being able to energy map the potential, other complementary means to the conventional techniques should be also adopted. As such, the application of elastic backscattering [7] was recently suggested in [8,9], while its role for probing properties of the optical potential and the structure of the involved nuclei has been extensively demonstrated in recent years [10][11][12][13][14][15][16][17].…”