An above-barrier narrow resonance in 15F

F. De Grancey, A. Mercenne, F. de Oliveira Santos, T. Davinson, O. Sorlin, J. C. Angelique, M. Assié, E. Berthoumieux, R. Borcea, A. Buta, I. Celikovic, V. Chudoba, J. M. Daugas, G. Dumitru, M. Fadil, S. Grévy, J. Kiener, A. Lefebvre-Scuhl, N. Michel, J. MrazekF. Negoita, J. Okołowicz, D. Pantelica, M. G. Pellegriti, L. Perrot, M. Płoszajczak, G. Randisi, I. Ray, O. Roig, F. Rotaru, M. G. Saint Laurent, N. Smirnova, M. Stanoiu, I. Stefan, C. Stodel, K. Subotic, V. Tatischeff, J. C. Thomas, P. Ujic, R. Wolski

Research output: Contribution to journalLetterpeer-review

Abstract

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 T = 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.
Original languageEnglish
Pages (from-to)26-31
Number of pages6
JournalPhysics Letters B
Volume758
DOIs
Publication statusPublished - 10 Jul 2016

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