Gurgi, L ARegan, P HSöderström, PAWatanabe, HWalker, Philip MPodolyak, Zs.Nishimura, SBerry, T ADoornenbal, P.Lorusso, GIsobe, T.Baba, H.Xu, Z.Y.Sakurai, H.Sumikama, TCatford, W.N.Bruce, A MBrowne, FLane, GregoryKondev, Filip GOdahara, A.Wu, J.Liu, H LXu, F RKorkulu, Z2021-07-160969-806Xhttp://hdl.handle.net/1885/240617In-flight fission of a 345 MeV per nucleon 238U primary beam on a 2 mm thick 9Be target has been used to produce and study the decays of a range of neutron-rich nuclei centred around the doubly mid-shell nucleus 170Dy at the RIBF Facility, RIKEN, Japan. The produced secondary fragments of interest were identified event-by event using the BigRIPS separator. The fragments were implanted into the WAS3ABI position sensitive silicon active stopper which allowed pixelated correlations between implants and their subsequent β-decay. Discrete γ-ray transitions emitted following decays from either metastable states or excited states populated following beta decay were identified using the 84 coaxial high-purity germanium (HPGe) detectors of the EURICA spectrometer, which was complemented by 18 additional cerium-doped lanthanum bromide (LaBr3) fast-timing scintillation detectors from the FATIMA collaboration. This paper presents the internal decay of a metastable isomeric excited state in the odd-odd nucleus 168Tb, which corresponds to a single proton-neutron hole configuration in the valence maximum nucleus 170Dy. These data represent the first information on excited states in this nucleus, which is the most neutron rich odd-odd isotope of terbium (Z=65) studied to date. Nilsson configurations associated with an axially symmetric, prolate-deformed nucleus are proposed for the 168Tb ground state the observed isomeric state by comparison with Blocked BCS-Nilsson calculationsapplication/pdfen-AU© 2017 Published by Elsevier Ltd.Structure of neutron-rich TerbiumradioisotopesGamma-ray spectroscopy and nuclearisomerismPossible two-quasiparticle configurationsNuclear energy-level schemes201710.1016/j.radphyschem.2016.12.0112020-11-23