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.

References in corpus (5)

• Radioactive decays at limits of nuclear stability
• Two-proton radioactivity
• Proton-proton correlations observed in two-proton decay of ${}^{19}$Mg and ${}^{16}$Ne
• Distinction between sequential and direct three-body decays
• Two-proton radioactivity and three-body decay. IV. Connection to quasiclassical formulation

Cited by in corpus (5)

• Probing Nuclear forces beyond the drip-line using the mirror nuclei ${}^{16}$N and ${}^{16}$F
• An above-barrier narrow resonance in ${}^{15}$F
• Invariant-mass spectroscopy of ${}^{18}$Ne, ${}^{16}$O, and ${}^{10}$C excited states formed in neutron transfer reactions
• Probing nuclear forces beyond the nuclear drip line: The cases of ${}^{16}$F and ${}^{15}$F
• Gamow shell model study of the 17Ne(p, p) reaction and of isospin symmetry breaking in 18Na