SEARCH FOR NEW NEUTRON-RICH NUCLEI WITH A 70A MEV CA-48 BEAM

The results of an experiment by the RIKEN-JINR collaboration on search for new Ne, Na, Mg, Al isotopes close to the neutron drip line are pr esented. We found for the first time three new neutron-rich nuclei Mg- 38 and Al-40,Al-41. Some clue for particle unstability of Ne-33 was al so obtained. These nuclei were produced by the projectile fragmentatio n of a 70A MeV Ca-48 beam on a Ta-181 target. The reaction fragments w ere analyzed by the fragment separator RIPS at RIKEN, and were unambig uously identified by measuring the magnetic rigidity, time-of-flight, energy loss and total kinetic energy.