Production and identification of new neutron-rich nuclei, 31Ne and 37Mg, in the reaction 80A MeV 50Ti+181Ta.

We report on the first production and identification of two neutron-rich nuclei {sup 31}Ne and {sup 37}Mg. They were produced in the projectile fragmentation of an 80{ital A} MeV {sup 50}Ti beam on a {sup 181}Ta target, and were efficiently analyzed and identified through the fragment separator RIPS at RIKEN, by measuring the magnetic rigidity, time of flight, energy loss, and total kinetic energy. The particle stability of the new isotopes is discussed in comparison with various mass predictions. {copyright} {ital 1996 The American Physical Society.}