β--DELAYED AND ISOMER SPECTROSCOPY OF NEUTRON-RICH Ta AND W ISOTOPES.

Decays of neutron-rich A ~ 190 nuclei have been studied following projectile fragmentation of a ²⁰⁸Pb beam on a ⁹Be target at the GSI Fragment Separator. Gamma-ray decays from previously reported isomeric states in ¹⁸⁸Ta, ¹⁹⁰W and ^192,193Re were used as internal calibrations for the particle identification analysis, together with the identification of previously unreported isomeric decays in ¹⁸⁹Ta and ¹⁹¹W. The current work also identifies β-delayed γ rays following the decay of ¹⁸⁸Ta to ¹⁸⁸W for the first time. [ABSTRACT FROM AUTHOR]