Abstract
Neutron-rich nuclides in the vicinity of the semi-magic nucleus 68Ni have been produced by fragmentation of a 70 MeV/nucleon 76Ge beam in a Be target. Beta-delayed γ ray studies were performed for these nuclides using a collection wheel apparatus, two thin plastic scintillators, and two large volume Ge detectors. A 195-keV isomeric transition was identified in 73Zn having T1/2=13.0(2) ms. A 1296-keV γ-ray transition with T1/2=3.4(7) s has also been identified. The half-life of this transition is not consistent with the known beta-decay half-lives of nuclides in this region and may be evidence for a new β-decaying isomeric state in 69Ni or 71Cu.
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