High spin states populated via projectile fragmentation in very neutron-rich nuclei around masses 190–200.

Fragmentation of [sup 208]Pb has been used to populate very neutron-rich nuclei in the transitional region with A∼190–200. The isomeric states of these nuclei have been studied using γ-ray spectroscopy. After fragmentation, the nuclei of interest were separated, identified and finally implanted in an aluminum plate surrounded by a γ-spectroscopy set-up. This experiment has proven the ability of such a technique to populate medium to high spin states and γ-ray transitions have been observed for the first time in a number of neutron-rich nuclei in this region, including [sup 190]W, [sup 195]Os, [sup 197]Ir, [sup 202]Pt. © 2002 American Institute of Physics. [ABSTRACT FROM AUTHOR]