论文标题
d $ _2 $分子在超氟氦纳米环中的飞秒旋转动力学
Femtosecond rotational dynamics of D$_2$ molecules in superfluid helium nanodroplets
论文作者
论文摘要
D $ _2 $分子在氦纳米光中的旋转动力学是由中等强度的飞秒（FS）泵浦脉冲诱导的，并通过记录HED $^+$ $离子的产量，通过延迟的FS探针脉冲来记录HED $^+$离子的产量，并根据时间的函数进行测量。产量以185 fs的周期振荡，反映了无场旋转波数据包动力学，并且振荡持续了500多个周期。在实验不确定性中，由傅立叶分析确定的droplet d $ _2 $分子的旋转常数BHE与孤立的D $ _2 $分子的BGA相同。我们的观察结果表明，helium Nanodroplet中的D $ _2 $分子本质上是作为免费的D $ _2 $分子旋转的。
Rotational dynamics of D$_2$ molecules inside helium nanodroplets is induced by a moderately intense femtosecond (fs) pump pulse and measured as a function of time by recording the yield of HeD$^+$ ions, created through strong-field dissociative ionization with a delayed fs probe pulse. The yield oscillates with a period of 185 fs, reflecting field-free rotational wave packet dynamics, and the oscillation persists for more than 500 periods. Within the experimental uncertainty, the rotational constant BHe of the in-droplet D$_2$ molecule, determined by Fourier analysis, is the same as Bgas for an isolated D$_2$ molecule. Our observations show that the D$_2$ molecules inside helium nanodroplets essentially rotate as free D$_2$ molecules.
