An above-barrier narrow resonance in 15F

An above-barrier narrow resonance in 15F

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) ...

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Veröffentlicht in:Physics letters. B 2016-07, Vol.758 (C), p.26-31
Hauptverfasser: 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.
Format: Artikel
Sprache:eng
Schlagworte:
15F
Elastic proton scattering, lifetimes, width
Overbarrier resonance
Resonances
Unbound states
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Beschreibung
Zusammenfassung: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.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2016.04.051