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  • An above-barrier narrow res...
    de Grancey, F.; Mercenne, A.; de Oliveira Santos, F.; Davinson, T.; Sorlin, O.; Angélique, J.C.; Assié, M.; Berthoumieux, E.; Borcea, R.; Buta, A.; Celikovic, I.; Chudoba, V.; Daugas, J.M.; Dumitru, G.; Fadil, M.; Grévy, S.; Kiener, J.; Lefebvre-Schuhl, A.; Michel, N.; Mrazek, J.; Negoita, F.; Okołowicz, J.; Pantelica, D.; Pellegriti, M.G.; Perrot, L.; Płoszajczak, M.; Randisi, G.; Ray, I.; Roig, O.; Rotaru, F.; Saint Laurent, M.G.; Smirnova, N.; Stanoiu, M.; Stefan, I.; Stodel, C.; Subotic, K.; Tatischeff, V.; Thomas, J.C.; Ujić, P.; Wolski, R.

    Physics letters. B, 07/2016, Volume: 758, Issue: C
    Journal Article

    Intense and purified radioactive beam of post-accelerated 14O was used to study the low-lying states in the unbound 15F nucleus. Exploiting resonant elastic scattering in inverse kinematics with a thick target, the second excited state, a resonance at ER=4.757(6)(10) MeV with a width of Γ=36(5)(14) keV was measured for the first time with high precision. The structure of this narrow above-barrier state in a nucleus located two neutrons beyond the proton drip line was investigated using the Gamow Shell Model in the coupled channel representation with a 12C core and three valence protons. It is found that it is an almost pure wave function of two quasi-bound protons in the 2s1/2 shell.