학술논문
Narrow resonances in the continuum of the unbound nucleus $^{15}$F
Document Type
Working Paper
Author
Girard-Alcindor, V.; Mercenne, A.; Stefan, I.; Santos, F. de Oliveira; Michel, N.; Płoszajczak, M.; Assié, M.; Lemasson, A.; Clément, E.; Flavigny, F.; Matta, A.; Ramos, D.; Rejmund, M.; Dudouet, J.; Ackermann, D.; Adsley, P.; Assunção, M.; Bastin, B.; Beaumel, D.; Benzoni, G.; Borcea, R.; Boston, A. J.; Cáceres, 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.; Fougères, C.; Franchoo, S.; Galtarossa, F.; Georgiadou, A.; Gibelin, J.; Giraud, S.; González, V.; Goyal, N.; Gottardo, A.; Goupil, J.; Grévy, S.; Guimaraes, V.; Hammache, F.; Harkness-Brennan, L. J.; Hess, H.; Oliver, D. S. Judson; Kamalou, O.; Kameneyero, 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, Zs.; Portail, C.; Pullia, A.; Quintana, B.; Recchia, F.; Reiter, P.; Rezynkina, K.; Roger, T.; Rojo, J. S.; Rotaru, F.; Salsac, M. D.; Benítez, A. M. Sánchez; Sanchis, E.; Şenyigit, M.; de Séréville, N.; Siciliano, M.; Simpson, J.; Sohler, D.; Sorlin, O.; Stanoiu, M.; Stodel, C.; Suzuki, D.; Theisen, C.; Thomas, J. C.; Ujic, P.; Valiente-Dobón, J. J.; Zielińska, M.
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Subject
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Abstract
The structure of the unbound $^{15}$F nucleus is investigated using the inverse kinematics resonant scattering of a radioactive $^{14}$O beam impinging on a CH$_2$ target. The analysis of $^{1}$H($^{14}$O,p)$^{14}$O and $^{1}$H($^{14}$O,2p)$^{13}$N 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 $^{14}$O, and by sequential 2p emission to the ground state (g.s.) of $^{13}$N via the $1^-$ resonance of $^{14}$O. 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 $^{1}$H($^{14}$O,p)$^{14}$O and resonance spectrum in $^{15}$F are well reproduced in the unified framework of the GSM.
Comment: 7 pages, 4 figures
Comment: 7 pages, 4 figures