Study on Quasi-elastic Scattering Angular Distribution of Proton Drip-line Nucleus ¹⁷F+⁵⁸Ni at Energy near Coulomb Barrier

¹⁷F is a proton drip-line nucleus, which is an unstable weakly bound nucleus. As a proton drip-line nucleus, the proton separation energy of ¹⁷F is merely 601 keV. Its structure can be described as ¹⁶O+p. The first excited state of ¹⁷F was predicted to present a proton-halo structure. The experimental study of ¹⁷F is of great significance for further understanding the reaction mechanism of proton-rich weakly bound nuclei. In this work, the reaction mechanisms of ¹⁷F+⁵⁸Ni at the energy near the Coulomb barrier were investigated with the beam provided by the RIBLL1 terminal in Lanzhou. ¹⁷F and ¹⁶O were completely identified by using a self-designed telescope array consisting of ionization chambers and silicon detectors. The quasi-elastic scattering angular distribution of ¹⁷F+⁵⁸Ni at E_lab=63.0 MeV was obtained. Further theoretical calculations were carried out by continuum-discretized coupled-channels method, which can reproduce the experimental data reasonably well. Moreover, there is no significance difference between the calculations with and without couplings to the continuum states, indicating that the coupling effect on the continuum states of ¹⁷F is not strong for the elastic scattering channel.