论文标题
SF $ _ {6} $探测的SF $ _ {6}的核心状态，并用软X射线飞秒瞬态吸收振动波袋
Core-excited states of SF$_{6}$ probed with soft X-ray femtosecond transient absorption of vibrational wavepackets
论文作者
论文摘要
SF $ _6 $中的振动波袋，该振动型由脉冲刺激的拉曼散射与几个周期的红外脉冲创建，使用桌子 - 透视X射线瞬态吸收光谱光谱光谱范围在170-200 eV之间映射到五个硫核心兴奋的状态。飞秒振荡的X射线能量转移的幅度在很大程度上取决于状态的性质。用泵激光强度控制制备的波袋，以探测S-F拉伸运动的各种扩展的核心兴奋水平。这允许确定相对核心水平的势能梯度，与TDDFT计算很好地吻合。该实验证明了一种表征核心兴奋的势能表面的新方法。
A vibrational wavepacket in SF$_6$, created by impulsive stimulated Raman scattering with a few-cycle infrared pulse, is mapped onto five sulfur core-excited states using table-top soft X-ray transient absorption spectroscopy between 170-200 eV. The amplitudes of the X-ray energy shifts of the femtosecond oscillations depend strongly on the nature of the state. The prepared wavepacket is controlled with the pump laser intensity to probe the core-excited levels for various extensions of the S-F stretching motion. This allows the determination of the relative core-level potential energy gradients, in good agreement with TDDFT calculations. This experiment demonstrates a new means of characterizing core-excited potential energy surfaces.
