Department of Physics, University of Connecticut, Storrs, Connecticut 06269-3046, USA.
J Chem Phys. 2013 Apr 28;138(16):164302. doi: 10.1063/1.4801441.
We report the observation and analysis of the 3 (3)ΠΩ double-minimum electronic excited state of (39)K(85)Rb. The spin-orbit components (0(+), 0(-), 1, and 2) of this state are investigated based on potentials developed from the available ab initio potential curves. We have assigned the vibrational levels v' = 2-11 of the 3 (3)Π1,2 potentials and v' = 2-12 of the 3(3)Π0(+/-) potential. We compare our experimental observations of the 3 (3)ΠΩ state with predictions based on theoretical potentials. The observations are based on resonance enhanced multiphoton ionization of ultracold KRb in vibrational levels v" = 14-25 of the a (3)Σ(+) state. These a-state ultracold molecules are formed by photoassociation of ultracold (39)K and (85)Rb atoms to the 5(1) state of KRb followed by spontaneous emission to the a state.
我们报告了 (39)K(85)Rb 中 3 (3)ΠΩ 双势阱电子激发态的观察和分析。基于可用的从头算势能曲线，我们研究了该态的自旋轨道分量 (0(+), 0(-), 1 和 2)。我们已对 3 (3)Π1,2 势能的 v' = 2-11 振动能级和 3(3)Π0(+/-)势能的 v' = 2-12 振动能级进行了分配。我们将实验观察到的 3 (3)ΠΩ 态与基于理论势能的预测进行了比较。观察结果基于超冷 KRb 在 a (3)Σ(+)态的 v" = 14-25 振动能级上的共振增强多光子电离。这些 a 态超冷分子是通过将超冷 (39)K 和 (85)Rb 原子光缔合到 KRb 的 5(1)态，然后自发辐射到 a 态而形成的。
