High-spectral-resolution attosecond absorption spectroscopy of autoionization in xenon
High-spectral-resolution attosecond absorption spectroscopy of autoionization in xenon
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DOI：
10.1103/physreva.89.023408
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发表时间：
2014-02-10
影响因子：
2.9
通讯作者：
Leone, Stephen R.
中科院分区：
文献类型：
--
作者：
Bernhardt, Birgitta;Beck, Annelise R.;Leone, Stephen R.
氙的高激发态的衰减后，吸收极紫外光直接跟踪通过阿秒瞬态吸收光谱使用时间延迟的近红外扰动脉冲。自电离5s5p（6）6p和5s5p（6）7p通道的寿命分别为（21.9 ± 1.3）fs和（48.4 ± 5.0）fs。观察到的值支持传统的线宽测量获得的寿命估计。实验还获得了时间演化的衰变作为能量失谐的函数从共振中心，和量子力学的形式主义，正确地解释所观察到的能量依赖性。
The decay of highly excited states of xenon after absorption of extreme ultraviolet light is directly tracked via attosecond transient absorption spectroscopy using a time-delayed near-infrared perturbing pulse. The lifetimes of the autoionizing 5s5p(6)6p and 5s5p(6)7p channels are determined to be (21.9 +/- 1.3) fs and (48.4 +/- 5.0) fs, respectively. The observed values support lifetime estimates obtained by traditional linewidth measurements. The experiment additionally obtains the temporal evolution of the decay as a function of energy detuning from the resonance center, and a quantum mechanical formalism is introduced that correctly accounts for the observed energy dependence.