A continuous excitation band of a free-bound photoassociation transition of ytterbium atoms is observed as a red wing of the ${}^{1}S_0\text{−}{}^{1}P_1$ atomic line at 399 nm for a hot thermal vapor. The excitation to the $0_u^{+}$ molecular state is observed by monitoring fluorescence from the ${}^{3}P_1$ state atoms, which allows us to detect the production of ${\mathrm{Yb}}_2$ molecules with high sensitivity. The photoassociation is characterized in comparison with transitions to atomic Rydberg states. The time profile of the fluorescence signal suggests that the $0_u^{+}$ molecular state predissociates with states correlating to the ${}^{1}S_0+{}^{3}D_2$ atomic states.

中文翻译：

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S01-P11 原子跃迁附近镱二聚体的自由结合激发和预解离

镱原子的自由结合光缔合跃迁的连续激发带被观察为红翼 ${}^1秒_0\text{-}{}^1磷_1$热热蒸汽的 399 nm 原子线。的兴奋$0_{你}^{+}$ 通过监测荧光来观察分子状态 ${}^3磷_1$ 状态原子，这使我们能够检测 ${镝}_2$具有高灵敏度的分子。与原子里德堡态的跃迁相比，光缔合的特征是。荧光信号的时间分布表明$0_{你}^{+}$ 分子状态与与 ${}^1秒_0+{}^{3}D_2$ 原子态。