Spectroscopy of 18Na: Bridging the two-proton radioactivity of 19Mg
/ Authors
M. Assi'e, F. Santos, T. Davinson, F. D. Grancey, L. Achouri, J. Alc'antara-N'unez, T. A. Kalanee, J. Ang'elique, C. Borcea, R. Borcea
and 24 more authors
L. Caceres, I. Čeliković, V. Chudoba, D. Pang, C. Ducoin, M. Fallot, O. Kamalou, J. Kiener, Y. Lam, A. Lefebvre‐Schuhl, G. Lotay, J. Mrázek, L. Perrot, A. S'anchez-Ben'itez, F. Rotaru, M. Saint-Laurent, Y. Sobolev, N. Smirnova, M. Stanoiu, I. Stefan, K. Subotić, P. Ujic, R. Wolski, P. Woods
/ 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.
Journal: Physics Letters B