强X射线脉冲中来自团簇的慢电子
Slow electrons from clusters in strong Xray pulses
摘要：
通过强X射线脉冲从团簇中释放的电子显示出宽的动能谱，从原子过剩能量延伸到阈值，通常会出现一个强峰。这些低能电子通常归因于从高电荷团簇中形成的纳米等离子体蒸发。在这里，它示出，也直接发射的光电子产生一个明显的光谱特征接近阈值。此外，我们给出了直接光电子能谱的解析近似。
英文摘要：
Electrons released from clusters through strong Xray pulses show broad kinetic-energy spectra, extending from the atomic excess energy down to the threshold, where usually a strong peak appears. These low-energy electrons are normally attributed to evaporation from the nano-plasma formed in the highly-charged clusters. Here, it is shown that also directly emitted photo electrons generate a pronounced spectral feature close to threshold. Furthermore, we give an analytical approximation for the direct photo-electron spectrum.
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