Observation of isomeric states in neutron deficient A ∼ 80 nuclei following the projectile fragmentation of 92Mo -: art. no. 044309

gamma-ray decays depopulating isomeric states have been observed in a number of very neutron deficient nuclei around A similar to 80 following the projectile fragmentation of a Mo-92 primary beam. Previously unobserved decays have been identified in the N = Z + 2 nuclei Y-80(39) and Nb-84(41) and the N = Z nucleus, Tc-86(43), making the latter the heaviest N = Z nucleus to date in which a discrete gamma-ray transition has been assigned. The Lifetime of the previously reported I-pi =9/2 + isomeric state in Kr-73 has also been measured and a clearer picture of its decay properties has been deduced. Isomeric ratios have been measured and have been interpreted in terms of the yrast or nonyrast nature of the isomeric state.