一氧化氮长寿命类氢Rydberg态的激发与表征
Excitation and characterization of long-lived hydrogenic Rydberg states of nitric oxide
摘要：
用共振增强双色双光子激光从X $^2Π_{1/2}$基态激发到A $^2Σ^+$中间态，制备了主量子数在40 ~ 100之间，寿命超过10个$μ$ s的NO高里德堡态.在这些长寿命的里德堡态的分子进行检测和表征后126 $μ$ s的激光光激发状态选择性脉冲电场电离。激光激发和电场电离数据相结合，构建二维光谱图。这些地图被用来确定NO $^+$离子核心的旋转状态，所观察到的一系列长寿命类氢里德堡态收敛。所提出的结果铺平了道路的里德伯-斯塔克减速和静电捕获实验与NO，这有望进一步阐明这些长寿命的激发态的衰变动力学，并在低温下的离子-分子反应的研究是感兴趣的。
英文摘要：
High Rydberg states of nitric oxide (NO) with principal quantum numbers between 40 and 100 and lifetimes in excess of 10 $μ$s have been prepared by resonance enhanced two-color two-photon laser excitation from the X $^2Π_{1/2}$ ground state through the A $^2Σ^+$ intermediate state. Molecules in these long-lived Rydberg states were detected and characterized 126 $μ$s after laser photoexcitation by state-selective pulsed electric field ionization. The laser excitation and electric field ionization data were combined to construct two-dimensional spectral maps. These maps were used to identify the rotational states of the NO$^+$ ion core to which the observed series of long-lived hydrogenic Rydberg states converge. The results presented pave the way for Rydberg-Stark deceleration and electrostatic trapping experiments with NO, which are expected to shed further light on the decay dynamics of these long-lived excited states, and are of interest for studies of ion-molecule reactions at low temperatures.
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