Scattering of O16,18 beams on Cu63,65 targets: A systematic study of different reaction channels

Abstract

Precise quasielastic experimental excitation function for the $^{18}\mathrm{O}+^{65}\mathrm{Cu}$ system has been measured and its barrier distribution has been derived. Several reaction channels have been observed on the experimental spectra, revealing the presence of two-neutron and $\ensuremath{\alpha}$-stripping processes, as well as the proton pickup transfer, for which excitation functions were also measured. Extensive coupled channel and coupled reaction channel calculations have been performed to describe the experimental data. The inelastic couplings of target and projectile, and the ground state reorientation of the target, were important to the proper description of data. The transfer data were well described by calculations; however, it was shown that they almost do not affect the excitation function of $^{18}\mathrm{O}+^{65}\mathrm{Cu}$ quasielastic scattering. Whenever possible, structure shell model calculations have been performed to obtain the spectroscopic amplitudes of projectile and target overlaps. The two-neutron and $\ensuremath{\alpha}$-transfer reactions have been calculated considering the transferred particle as a cluster with spin 0.