Spectroscopy of the unbound nucleus {sup 18}Na in link with {sup 19}Mg two-proton radioactivity

The unbound nucleus 18Na, the intermediate nucleus in the two‐proton radioactivity of 19Mg, is studied through the resonant elastic scattering 17Ne(p,17Ne)p. The spectroscopic information obtained in this experiment is discussed and put in perspective with previous measurements and the structure of the mirror nucleus 18N.