Spectroscopy of $^{18}$Na: Bridging the two-proton radioactivity of $^{19}$Mg

Abstract : The unbound nucleus $^{18}$Na, the intermediate nucleus in the two-proton radioactivity of $^{19}$Mg, was studied by the measurement of the resonant elastic scattering reaction $^{17}$Ne(p,$^{17}$Ne)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 $^{19}$Mg radioactivity can be understood assuming a sequential emission of two protons via low energy tails of $^{18}$Na resonances.
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Submitted on : Friday, October 7, 2011 - 3:17:03 PM
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M. Assié, F. de Oliveira Santos, T. Davinson, F. de Grancey, N.L. Achouri, et al.. Spectroscopy of $^{18}$Na: Bridging the two-proton radioactivity of $^{19}$Mg. Physics Letters B, Elsevier, 2012, 712, pp.198-202. ⟨10.1016/j.physletb.2012.04.059⟩. ⟨in2p3-00630178⟩

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