Abstract
The ground-state properties of neutron-rich and its decay into have been studied using the CARIBU radioactive-ion-beam facility at Argonne National Laboratory. Niobium-106 ions were extracted from a fission source and mass separated before being delivered as low-energy beams to the Canadian Penning Trap, as well as the X-Array and SATURN -decay-spectroscopy station. The measured ground-state mass excess of keV is consistent with a recent measurement but has three times better precision; this work also rules out the existence of a second long-lived, -decaying state in above 5 keV in excitation energy. The decay half-life of was measured to be 1.097(21) s, which is longer than the adopted value. The level scheme of the decay progeny, , has been expanded up to . The distribution of decay strength and considerable population of excited states in of emphasizes the need to revise the adopted ground-state spin-parity assignment of ; it is more likely to be .
2 More- Received 12 October 2020
- Accepted 2 February 2021
DOI:https://doi.org/10.1103/PhysRevC.103.024323
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