【摘要】 根据最新的Cs₂分子中间态A¹∑_u⁺-b³Π_u全局解微扰获得的能级数据,归属了通过微扰增强红外-红外光学双共振中间态A¹∑_u⁺到上态2³△_1g的140条碰撞线,包含之前实验观测到的221条2³△1g←A¹∑_u⁺←X¹∑_g⁺双共振跃迁[J.Chem.Phys.128,204313（2008）],重新计算了2³△_1g态的分子常数和势能曲线（排除54个微扰能级）.本次拟合得到的离心畸变常数和从经验公式计算得到的值相符合.在亚多普勒激发光谱中,没有分辨出2³△_1g态的超精细结构.对2³△_g态的超精细结构进行初步计算,比较实验结果给出解释和说明.更多还原

【Abstract】 Accurately known energy level structure of the Cs₂ A¹∑_u⁺-b³∏_u complex of states from a recent global de-perturbation of these states has enabled additional assignments of 140 perturbation facilitated infrared-infrared double resonance（PFIIDR）transitions to the 2³Δ_1gstate from collisionally populated intermediate A¹∑_u⁺levels.Together with the 221 previously observed 2³Δ_1g←A¹∑_u⁺←X¹∑_g⁺double resonance lines[J.Chem.Phys.128,204313（2008）],molecular constants and the Rydberg-Klein-Rees potential energy curve of the 2³Δ_1gstate have been recalculated（excluding 54 perturbed levels）.The centrifugal distortion constant has been determined and agrees well with the value calculated based on standard empirical formulas.The hyperfine structure of the 2³Δ_g state,which has not resolved in our sub-Doppler excitation spectra of the 2³Δ_1gstate,has been interpreted with a preliminary simulation.更多还原