Spectroscopy of 18Na: Bridging the two-proton radioactivity of 19Mg

The unbound nucleus 18Na, the intermediate nucleus in the two-proton radioactivity of 19Mg, was studied by the measurement of the resonant elastic scattering reaction H(17Ne,p)17Ne performed at 4 A.MeV using a radioactive beam from the SPIRAL Facility. Spectroscopic properties of the low-lying states were obtained in an R-matrix analysis of the excitation function.