Retrieval of experimental differential electron–ion elastic scattering cross sections from high-energy ATI spectra of rare gas atoms by infrared lasers
Retrieval of experimental differential electron–ion elastic scattering cross sections from high-energy ATI spectra of rare gas atoms by infrared lasers
复制标题
利用红外激光从稀有气体原子高能 ATI 光谱中反演实验微分电子-离子弹性散射截面
DOI：
10.1088/0953-4075/42/10/105205
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
C. Lin
中科院分区：
文献类型：
--
作者：
T. Morishita;M. Okunishi;K. Shimada;G. Prümper;Zhangjin Chen;S. Watanabe;K. Ueda;C. Lin
基于最近发展的红外激光产生的高能光电子动量分布定量重散射理论的概念，我们应用该理论提取了目标离子与自由电子的大角度弹性微分截面（DCS）。利用Ne、Ar、Kr和Xe等稀有气体原子的实验光电子能谱表明，提取的DCS与理论计算的DCS非常吻合。当前的检索方法不需要精确了解峰值激光强度。结果表明，电子-离子散射之间的精确 DCS 确实可以从激光产生的实验光电子光谱中检索出来，从而为使用红外激光脉冲以几飞秒的时间分辨率对瞬态分子进行动态化学成像铺平了道路。
Based on the concept of the recently developed quantitative rescattering theory for the momentum distributions of high-energy photoelectrons generated by infrared lasers, we applied the theory to extract large-angle elastic differential cross sections (DCS) of the target ions with free electrons. Using experimental photoelectron spectra for rare gas atoms of Ne, Ar, Kr and Xe, we showed that the extracted DCS are in good agreement with the DCS calculated theoretically. The current method of retrieval does not require precise knowledge of the peak laser intensities. The results show that accurate DCS between electron–ion scattering indeed can be retrieved from experimental photoelectron spectra generated by lasers, thus paving the way for using infrared laser pulses for dynamic chemical imaging of transient molecules with temporal resolution of few femtoseconds.