Abstract
The decay of a new , isomeric state at 1298.0 keV has been observed using -ray spectroscopy at the Lohengrin mass spectrometer of the Institut Laue-Langevin. By comparison with theoretical calculations this state was assigned a dominant configuration. Prompt -ray data from a spontaneous fission experiment have also been analyzed allowing the observation of a collective band on top of this isomeric state, the identification of a new band on top of the previously reported () isomer of and the extension of collective bands on top of () isomers of the neighboring nuclei. Quasiparticle rotor model calculations reported in this work correctly predict the energies and decay patterns of these bands. A new () isomer in has also been observed. The calculations predict dominant configurations for all these () isomers.
13 More- Received 2 April 2009
DOI:https://doi.org/10.1103/PhysRevC.80.024304
©2009 American Physical Society