A reef in the sea of instability: Observation of a narrow state in 15F
Abstract
The properties of the low lying states of 15F were studied by measuring the resonant elastic scattering of an 14O radioactive beam on protons. This experiment was performed at GANIL with a post-accelerated beam produced by the SPIRAL1 facility. We confirm the existence of a second excited state in 15F with a narrow width, which may seem particularly surprising for a state located above the Coulomb barrier.