Isomeric States in Neutron-rich Isotopes near A~100*

The search for previously unknown nuclear isomers, or excited energy states within nuclei, continues to be an exciting frontier of nuclear physics as particle acceleration capabilities improve and unstable isotopes become more accessible. Nuclear isomers are typically formed as a result of in-flight fission and fragmentation reactions, and can exhibit metastable half-lives of the order of microseconds or longer. In order to discover potential new isomeric states within neutron-rich nuclei, a Be target was bombarded with a 345 MeV/nucleon 238U beam at the RIBF facility at RIKEN in Japan. The resulting fission produced a collection of isotopes in the A~100 range, which were separated out and implanted in the silicon detectors within the BRIKEN setup. Finally, 2 germanium clover detectors measured γ counts to identify energy levels from the produced isotopes. Here, we report on the observation of previously known gamma-decaying isomers, and search for new isomeric states for isotopes in the region from 92Se to 108Y.