Development of an ion guide coupled to an on-line isotope separation system on Sara. Identification and study of isospin exotic nuclei at Isolde and Sara

This work is concerned with the study of exotic nuclei located on both sides of the stability-line and known as neutron rich and neutron deficient respectively. For the former, produced by alpha particle-induced fission, an on-line isotope separation with an ion guide (IGISOL) has been developed and submitted to several off-line and on-line optimization tests showing capacity to spectroscopic studies. In the case of neutron deficient nuclei near the magicity Z=82, 182Tl(3s) has been identified and its decaying modes and those of 183Tl ground state, studied, using the on-line separator ISOLDE. On the other hand, the β decay of 172,175Ir produced in 32S induced reaction is studied using a helium jet system on the SARA accelerator. Existence of isomers is derived from half-lives measurements