New narrow resonances observed in the unbound nucleus F 15

Girard-Alcindor, V.; Mercenne, A.; Stefan, I.; De Oliveira Santos, F.; Michel, N.; Ploszajczak, M.; Assie, M.; Lemasson, A.; Clement, E.; Flavigny, F.; Matta, A.; Ramos, D.; Rejmund, M.; Dudouet, J.; Ackermann, D.; Adsley, P.; Assuncao, M.; Bastin, B.; Beaumel, D.; Benzoni, G.; Borcea, R.; Boston, A. J.; Brugnara, D.; Caceres, L.; Cederwall, B.; Celikovic, I.; Chudoba, V.; Ciemala, M.; Collado, J.; Crespi, F. C. L.; D'Agata, G.; De France, G.; Delaunay, F.; Diget, C.; Domingo-Pardo, C.; Eberth, J.; Fougeres, C.; Franchoo, S.; Galtarossa, F.; Georgiadou, A.; Gibelin, J.; Giraud, S.; Gonzalez, V.; Goyal, N.; Gottardo, A.; Goupil, J.; Grevy, S.; Guimaraes, V.; Hammache, F.; Harkness-Brennan, L. J.; Hess, H.; Jovancevic, N.; Judson Oliver, D. S.; Kamalou, O.; Kamenyero, A.; Kiener, J.; Korten, W.; Koyama, S.; Labiche, M.; Lalanne, L.; Lapoux, V.; Leblond, S.; Lefevre, A.; Lenain, C.; Leoni, S.; Li, H.; Lopez-Martens, A.; Maj, A.; Matea, I.; Menegazzo, R.; Mengoni, D.; Meyer, A.; Million, B.; Monteagudo, B.; Morfouace, P.; Mrazek, J.; Niikura, M.; Piot, J.; Podolyak, Z.; Portail, C.; Pullia, A.; Quintana, B.; Recchia, F.; Reiter, P.; Rezynkina, K.; Roger, T.; Rojo, J. S.; Rotaru, F.; Salsac, M. D.; Sanchez Benitez, A. M.; Sanchis, E.; Senyigit, M.; De Sereville, N.; Siciliano, M.; Simpson, J.; Sohler, D.; Sorlin, O.; Stanoiu, M.; Stodel, C.; Suzuki, D.; Theisen, C.; Thisse, D.; C. thomas J.,; Ujic, P.; Valiente-Dobon, J. J.; Zielinska, M.

doi:10.1103/PhysRevC.105.L051301

The structure of the unbound F15 nucleus is investigated using the inverse kinematics resonant scattering of a radioactive O14 beam impinging on a CH2 target. The analysis of H1(O14,p)O14 and H1(O14,2p)N13 reactions allowed the confirmation of the previously observed narrow 1/2- resonance, near the two-proton decay threshold, and the identification of two new narrow 5/2- and 3/2- resonances. The newly observed levels decay by 1p emission to the ground of O14, and by sequential 2p emission to the ground state of N13 via the 1- resonance of O14. Gamow shell model (GSM) analysis of the experimental data suggests that the wave functions of the 5/2- and 3/2- resonances may be collectivized by the continuum coupling to nearby 2p- and 1p-decay channels. The observed excitation function H1(O14,p)O14 and resonance spectrum in F15 are well reproduced in the unified framework of the GSM.