MASS MEASUREMENTS OF STORED AND COOLED EXOTIC NUCLEI AT GSI

Recent results of mass measurements of exotic heavy nuclei using Schot tky mass spectrometry are reported. The investigated nuclei were produ ced and separated by the frag ment separator FRS, injected, stored and cooled in the experimental storage ring ESR. Their masses were determ ined from the frequency analysis of the beam noise. In the present exp eriment the masses of more than 150 proton-rich nuclei in the mass reg ion A similar or equal to 200 have been determined for the first time. Representative results are given for proton-separation energies and s hell corrections. For some elements the proton drip line can be determ ined.