Spectroscopy of neutron-deficient nuclei around $^{36}$Ca
Résumé
An experiment was performed to extend the knowledge of excited states in neutron-deficient Ca isotopes. In particular, excited states in $^{36}$Ca were searched for to allow for a comparison with its stable mirror nucleus, $^{36}$S. Secondary beams of $^{37}$Ca and $^{36}$Ca were produced by fragmentation of a primary $^{40}$Ca beam with an energy of 95 · A MeV on the SISSI target at GANIL. A variety of nuclei around $^{36}$Ca has been produced in a secondary Be target by neutron and proton-removal at beam energies around 61 · A MeV. The produced nuclei were identified using the spectrometer SPEG, and prompt $\gamma$ rays were measured with the Château de Cristal. A preliminary value for the energy of the first $2^+$ state of $^{36}$Ca has been determined.