학술논문
Probing Nuclear forces beyond the drip-line using the mirror nuclei $^{16}$N and $^{16}$F
Document Type
Working Paper
Author
Stefan, I.; Santos, F. de Oliveira; Sorlin, O.; Davinson, T.; Lewitowicz, M.; Dumitru, G.; Angélique, J. C.; Angélique, M.; Berthoumieux, E.; Borcea, C.; Borcea, R.; Buta, A.; Daugas, J. M.; De Grancey, F.; Fadil, M.; Grévy, S.; Kiener, J.; Lefebvre-Schuhl, A.; Lenhardt, M.; Mrazek, J.; Negoita, F.; Pantelica, D.; Pellegriti, M. G.; Perrot, L.; Ploszajczak, M.; Roig, O.; Laurent, M. G. Saint; Ray, I.; Stanoiu, M.; Stodel, C.; Tatischeff, V.; Thomas, J. C.
Source
Physical Review C 90 (2014) 014307
Subject
Language
Abstract
Radioactive beams of $^{14}$O and $^{15}$O were used to populate the resonant states 1/2$^+$, 5/2$^+$ and $0^-,1^-,2^-$ in the unbound $^{15}$F and $^{16}$F nuclei respectively by means of proton elastic scattering reactions in inverse kinematics. Based on their large proton spectroscopic factor values, the resonant states in $^{16}$F can be viewed as a core of $^{14}$O plus a proton in the 2s$_{1/2}$ or 1d$_{5/2}$ shell and a neutron in 1p$_{1/2}$. Experimental energies were used to derive the strength of the 2s$_{1/2}$-1p$_{1/2}$ and 1d$_{5/2}$-1p$_{1/2}$ proton-neutron interactions. It is found that the former changes by 40% compared with the mirror nucleus $^{16}$N, and the second by 10%. This apparent symmetry breaking of the nuclear force between mirror nuclei finds explanation in the role of the large coupling to the continuum for the states built on an $\ell=0$ proton configuration.
Comment: 6 pages, 3 figures, 2 tables, accepted for publication as a regular article in Physical Review C
Comment: 6 pages, 3 figures, 2 tables, accepted for publication as a regular article in Physical Review C