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Publication

New narrow resonances observed in the unbound nucleus 15F

Authors

Girard-Alcindor, V.; Mercenne, A.; Stefan, I.; de Oliveira Santos, F.; Michel, N.; Ploszajczak, M.; Assie, M.; Lemasson, A.; Clement, E.; Flavigny, F.; Siciliano, M.

Abstract

The structure of the unbound 15F nucleus is investigated using the inverse kinematics resonantscattering of a radioactive 14O beam impinging on a CH2 target. The analysis of 1H(14O,p)14O and 1H(14O,2p)13N reactions allowed the confirmation of the previously observed narrow 1/2resonance, near the two-proton decay threshold, and the identification of two new narrow 5/2and 3/2 resonances. The newly observed levels decay by 1p emission to the ground of 14O, andby sequential 2p emission to the ground state (g.s.) of 13N via the 1 resonance of 14O. Gamowshell model (GSM) analysis of the experimental data suggests that the wave functions of the 5/2and 3/2 resonances may be collectivized by the continuum coupling to nearby 2p- and 1p- decaychannels. The observed excitation function 1H(14O