  The ground-state properties of neutron-rich 106Nb and its beta decay into
106Mo have been studied using the CARIBU radioactive-ion-beam facility at
Argonne National Laboratory. Niobium-106 ions were extracted from a 252Cf
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
beta-decay-spectroscopy station. The measured 106Nb ground-state mass excess of
-66202.0(13) 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, beta-decaying state in 106Nb above 5 keV in excitation energy. The
decay half-life of 106Nb was measured to be 1.097(21) s, which is 8% longer
than the adopted value. The level scheme of the decay progeny, 106Mo, has been
expanded up to approximately 4 MeV. The distribution of decay strength and
considerable population of excited states in 106Mo of J >= 3 emphasises the
need to revise the adopted Jpi = 1- ground-state spin-parity assignment of
106Nb; it is more likely to be J => 3.
