Narrow resonances in the continuum of the unbound nucleus $^{15}$F

Girard-Alcindor, V, Mercenne, A, Stefan, I, Santos, F de Oliveira, Michel, N, Płoszajczak, M, Assié, M, Lemasson, A, Clément, E, Flavigny, F
et al (show 93 more authors) (2021) Narrow resonances in the continuum of the unbound nucleus $^{15}$F. [Preprint]

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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.

Item Type: Preprint
Additional Information: 7 pages, 4 figures
Uncontrolled Keywords: nucl-ex, nucl-ex, nucl-th
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 02 Feb 2022 10:59
Last Modified: 19 May 2022 12:28
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