The $\beta$ decay of ${}^{125m,125}\mathrm{Ag}$ into levels in ${}^{125}\mathrm{Cd}$ was investigated at the Holifield Radioactive Ion Beam Facility (HRIBF). Uranium-238 targets were bombarded with 50-MeV protons with an intensity of $15\mu$A, and the induced fission products were mass separated and deposited on a moving tape in the center of the VANDLE array consisting of $\gamma$ detectors and plastic scintillators. A partial decay scheme has been assigned for both $\beta$ decay of the (9/$2^{+}$) ground state of ${}^{125}\mathrm{Ag}$ and its low-lying (1/$2^{-}$) isomer, with the energy of the low-lying (11/$2^{-}$) isomeric state in ${}^{125}\mathrm{Cd}$ assigned as 188.5 keV. In addition, $\beta$-delayed neutron emission probabilities were also determined to be 1.2(2)% for the (9/$2^{+}$) ${}^{125}\mathrm{Ag}$ ground state and 4.6(10)% for the (1/$2^{-}$) isomer, which are substantially lower than the previously reported value.

中文翻译：

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由Ag125和Ag125的β衰变填充的Cd125中的水平

这 $\beta$ 衰败 ${}^{125米,125}银$ 进入水平 ${}^{125}\mathrm{光盘}$在 Holifield 放射性离子束设施 (HRIBF) 进行了调查。Uranium-238 目标被 50-MeV 质子轰击，强度为$15\mu$A，诱导裂变产物被质量分离并沉积在 VANDLE 阵列中心的移动胶带上，包括 $\gamma$探测器和塑料闪烁体。已为两者指定了部分衰减方案$\beta$ (9/$2^{+}$) 的基态 ${}^{125}银$ 及其地势低洼 (1/$2^{-}$) 异构体，具有低洼能量 (11/$2^{-}$) 异构状态 ${}^{125}\mathrm{光盘}$指定为 188.5 keV。此外，$\beta$-延迟中子发射概率也被确定为 1.2(2)% (9/$2^{+}$) ${}^{125}银$ 基态和 4.6(10)% (1/$2^{-}$) 异构体，大大低于先前报告的值。