Study of Nuclear Structure of ¹³C and ²⁰Ne by Low Energy Nuclear Reactions

We report some recent experimental results on the spectroscopy of ¹³C and ²⁰Ne nuclei by means of low energy nuclear reactions carried out with high resolution electrostatic accelerators. In the case of ¹³C we investigated the possible existence of a-cluster states above the a emission threshold by means of low energy elastic resonant scattering α+⁹Be in direct kinematics. Excitation functions show the presence of various resonances that have been reproduced by R-matrix fit. We studied also the structure of ²⁰Ne by means of the ¹⁹F(p,α₀) reaction at sub-barrier energies. The spectroscopy of ²⁰Ne excited states in the region E_x ≈ 13.5-14.0 MeV can be probed by analyzing experimental angular distributions and excitation functions. This reaction plays an important role also in the CNOF cycle and is an important ingredient to describe hydrogen-induced destruction of fluorine in massive stars. For this reason we investigated the trend of S-factor, that has been compared with results previously reported in the literature