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

中文翻译：

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富中子的Nb106的基态和衰变特性

富中子的基态性质 ${}^{106}铌$ 及其 $\beta$ 腐烂成 ${}^{106}莫$已使用阿贡国家实验室的CARIBU放射性离子束设施进行了研究。铌106离子从${}^{252}f$ 裂变源和质量分离，然后作为低能束传递到加拿大Penning陷阱，X阵列和SATURN $\beta$衰减光谱站。实测${}^{106}铌$ 基态质量超过 $-66202.0（13）$keV与最近的测量结果一致，但精度提高了三倍；这项工作还排除了第二个长寿的存在，$\beta$衰变状态 ${}^{106}铌$激发能量高于5 keV。的衰变半衰期${}^{106}铌$ 测得为1.097（21）s，即 $8％$比采用的值长。衰变后代的水平方案，${}^{106}莫$，已扩展到 $\approx 4\mathrm{病毒}$。衰变强度的分布和大量的激发态。${}^{106}莫$ 的 $Ĵ\ge 3$ 强调需要修改已通过的 ${Ĵ}^{\pi }={\mathrm{1个}}_{}^{-}$ 的基态自旋奇偶校验分配 ${}^{106}铌$; 它更有可能是$Ĵ\ge 3$。