Experimental nuclear structure and decay data are evaluated for all of 15 known nuclides of mass 123 (Ru, Rh, Pd, Ag, Cd, In, Sn, Sb, Te, I, Xe, Cs, Ba, La, Ce). For each nuclide, detailed evaluated spectroscopic information is presented in each reaction and decay, and the best values combining all available data are recommended for level properties, γ and β radiations, and other spectroscopic properties. No excited states have been identified in ¹²³Ru, ¹²³Rh and ¹²³Pd. For ¹²³Ag, the long-predicted 1/2⁻ β-emitting isomer has been identified at 60-keV by 2019Ch24 recently, resolving unknown excitation energies in the level scheme that was previously available only from isomeric decays of two isomers (202 ns and 393 ns) with the position and spin-parity of the former remaining unknown. Significant discrepancies exist between data on high-spin sequences based on 11/2⁽⁻⁾ isomer in ¹²³Cd (2002Hw01 and 2016Re05), which needs to be resolved with further experimental investigation. In ¹²³Cs, the 114-ns isomer as the πg_9/2 bandhead proposed at 231.6+x by 2000Gi12 has been resolved by 2004Si26 and 2004Si27 to be the 328-keV level that is proposed by 2000Gi12 as a separate level. Excited states in ¹²³La and ¹²³Ce have only been studied via (HI, xnγ) reactions, with their base levels and thus excitation energies remaining unknown. The β⁻ decay schemes for daughter nuclide ¹²³Cd, ¹²³In and ¹²³Sn and the ε decay schemes for ¹²³Xe, ¹²³Cs and ¹²³Ba are considered incomplete due to large gaps between the highest observed excited levels and the Q-values. ¹²³Sn, ¹²³Sb, ¹²³Te and ¹²³I are the most extensively studied nuclides via various reactions and decays. This work supersedes earlier full evaluations of A=123 by 2004Oh11, 1993Oh12, 1980Ta02 and 1972Au10.

对所有 15 种已知质量为 123 的核素（Ru、Rh、Pd、Ag、Cd、In、Sn、Sb、Te、I、Xe、Cs、Ba、La、Ce）的实验核结构和衰变数据进行了评估。对于每个核素，在每个反应和衰变中都提供了详细的评估光谱信息，并且建议结合所有可用数据的最佳值用于水平特性、γ和β辐射以及其他光谱特性。在¹²³ Ru、¹²³ Rh 和¹²³ Pd 中没有发现激发态。对于¹²³ Ag，长期预测的 1/2 ⁻ β最近，2019Ch24 已在 60 keV 处鉴定出发射异构体，解决了以前只能从两种异构体（202 ns 和 393 ns）的同分异构衰变获得的能级方案中的未知激发能量，以及前者的位置和自旋奇偶性剩下的未知。基于¹²³ Cd（2002Hw01 和 2016Re05​​）中的11/2 ^(-)异构体的高自旋序列数据之间存在显着差异，需要通过进一步的实验研究来解决。在¹²³ Cs 中，2000Gi12 在 231.6+x 处提出的作为π g _9/2带头的 114-ns 异构体已被 2004Si26 和 2004Si27 解析为 328-keV 能级，而 2000Gi12 则提出作为单独的能级。^{123 中的}兴奋状态La 和¹²³ Ce 仅通过 (HI, xn γ ) 反应进行研究，它们的基能级和激发能仍然未知。子核素¹²³ Cd、¹²³ In 和¹²³ Sn的β ^-衰变方案以及¹²³ Xe、¹²³ Cs 和¹²³ Ba的ε衰变方案被认为是不完整的，因为观察到的最高激发能级与 Q 值之间存在很大差距。¹²³ Sn、¹²³ Sb、¹²³ Te 和¹²³我是通过各种反应和衰变进行最广泛研究的核素。这项工作取代了 2004Oh11、1993Oh12、1980Ta02 和 1972Au10 之前对 A=123 的完整评估。