First states of Fluorine fifteen studied by resonant elastic scattering.

This thesis describes a study of a light proton-rich nuclei located beyond drip-line : ¹⁵F.
It was populated using a resonant elastic scattering reaction in inverse kinematic : ¹⁴O(p,¹⁴O)p. A ¹⁴O beam was sent on a thick polyprophylene target. This experiment was done at GANIL using a post-accelerated radioactive beam from SPIRAL facility. Excitation fonction was measured until 5.6MeV resonance energy and showed three resonant states. One of them was a negative parity state, observed for the first time. Two decay channels were found for to this state, one corresponding to the proton decay, and the other suggested as a (p, gamma) decay via a virtual state of ¹⁴O. Results are discussed in the framework of nuclear structure and presence of two-protons or (p,gamma}) decay.