Rare-gas clusters in intense extreme-ultraviolet pulses from a high-order harmonic source.
Rare-gas clusters in intense extreme-ultraviolet pulses from a high-order harmonic source.
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来自高次谐波源的强烈极紫外脉冲中的稀有气体簇。
DOI：
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发表时间：
2014
影响因子：
8.6
通讯作者：
A. Rouzée
中科院分区：
文献类型：
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作者：
B. Schütte;M. Arbeiter;T. Fennel;M. Vrakking;A. Rouzée
我们报告了两个以前未确认的影响，在电离的稀有气体集群的强烈的极紫外脉冲的证据。首先，电子光谱表明，由于电子原子碰撞，较大的团簇的各向同性增加的多步光电发射。第二，非常慢（meV）的电子被解释为第一个实验证据的里德伯样原子态形成的纳米等离子体膨胀。只发现了小部分的Xe2+离子，与以前在可比条件下记录的结果形成鲜明对比[Murphy等人，物理学评论快报101，203401（2008）。
We report evidence for two previously unidentified effects in the ionization of rare-gas clusters by intense extreme-ultraviolet pulses. First, electron spectra indicate multistep photoemission with increasing isotropy for larger clusters due to electron-atom collisions. Second, very slow (meV) electrons are interpreted as the first experimental evidence for Rydberg-like atomic state formation in the nanoplasma expansion. Only small fractions of Xe2+ ions were found, in sharp contrast to previous results recorded under comparable conditions [Murphy et al., Phys. Rev. Lett. 101, 203401 (2008).