We identify two metastable excited states in Sm highly charged ion as candidates for high accuracy optical clocks. Several atomic properties relevant to optical clock development are calculated using relativistic many-body methods. This includes energy levels, transition amplitudes, lifetimes, scalar polarizabilities, black body radiation shift, and the sensitivity to the fine structure constant variation. We found that the clock transitions are not sensitive to perturbation, e.g., relative black body radiation shifts are . The enhancement factor for the variation is 0.8 for one clock transition and 16 for another.

中文翻译：

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基于Sm的对精细结构常数变化敏感的高精度光钟[公式略]


我们确定了 Sm 高电荷离子中的两种亚稳态激发态作为高精度光学时钟的候选者。使用相对论多体方法计算与光学钟开发相关的几个原子特性。这包括能级、跃迁幅度、寿命、标量极化率、黑体辐射位移以及对精细结构常数变化的敏感性。我们发现时钟跃迁对扰动不敏感，例如，相对黑体辐射偏移是 。一个时钟转换的变化增强因子为 0.8，另一时钟转换的增强因子为 16。