论文标题
$^{39} $ kcs分子的激发电子状态的研究与K（$ 4^2 $ s）+CS（$ 5^2 $ d）渐近：实验和理论
Study of excited electronic states of the $^{39}$KCs molecule correlated with the K($4^2$S)+Cs($5^2$D) asymptote: experiment and theory
论文作者
论文摘要
使用极化标记光谱法，我们对$^{39} $ kcs分子的激发电子状态的级别结构进行了详细分析，以激发能量间隔在17500〜cm $^{ - 1} $和18600 〜cm $ $ $^{ - 1} $上面的$ v = 0 $ v = 0 $ x^$ x^1σ^^1σ^^1σ^^^1σ^^^^^^^^1的$ v = 0 $ v = 0 $ v = 0。我们证明，观察到的状态通过高于18200 〜cm $^{ - 1} $的自旋轨道相互作用强烈耦合，这表现为记录的光谱中的许多扰动。通过对KC的准确电子结构计算的指导来解释光谱，包括势能曲线，过渡电偶极矩，以及用准脱糖有效的汉密尔顿方法来表示自旋轨道相互作用。理论与实验之间的一致性显着，在可用的理论数据之间明显区分。这项研究证实了极化标记光谱的准确性，以分析具有致密水平结构的高度激发的电子分子状态。
Using the polarisation labelling spectroscopy, we performed the detailed analysis of the level structure of excited electronic states of the $^{39}$KCs molecule in the excitation energy interval between 17500~cm$^{-1}$ and 18600~cm$^{-1}$ above the $v=0$ level of the $X^1Σ^+$ ground state. We prove that the observed states are strongly coupled by spin-orbit interaction above 18200~cm$^{-1}$, as manifested by numerous perturbations in the recorded spectra. The spectra are interpreted with the guidance of accurate electronic structure calculations on KCs, including potential energy curves, transition electric dipole moments, and representation of the spin-orbit interaction with a quasi-diabatic effective Hamiltonian approach. The agreement between theory and experiment is found remarkable, clearly discriminating among the available theoretical data. This study confirms the accuracy of the polarisation labelling spectroscopy to analyse highly-excited electronic molecular states which present a dense level structure.
