Spectroscopy of 18Na: Bridging the two-proton radioactivity of 19Mg
Abstract
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 17Ne(p,17Ne)p performed at 4 A.MeV. Spectroscopic properties of the low-lying states were obtained in a R-matrix analysis of the excitation function. Using these new results, we show that the lifetime of the 19Mg radioactivity can be understood assuming a sequential emission of two protons via low energy tails of 18Na resonances.
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