Spectroscopy and secondary reactions of proton-rich nuclei and the search for new isotopes

Two experiments performed at GSI and GANIL are reviewed. Using a primary beam of 58Ni at 650 MeV/nucleon impinging on a beryllium target, production cross sections of proton-rich fragments from projectile fragmentation have been measured at the projectile-fragment separator FRS at GSI. The production rates measured demonstrate that counting rates much higher than expected can be obtained at the proton drip line. The results from spectroscopy measurements show that no Thomas-Ehrmann effect is present in our data which means that the decay energies and masses can be well predicted by using e.g. the IMME. The partial charge-changing cross sections show an odd-even staggering which is much more pronounced when approaching the proton drip line. An experiment performed at the SISSI/LISE facility at GANIL is also presented. Using an 78Kr primary beam, 5 new isotopes: 60Ga, 64As, 69,70Kr, and 74Sr have been observed. No evidence have been found for 69Br which has been observed with a few counts at MSU. (authors). 22 refs., 9 figs