Short-Time Electron Dynamics in Aluminum Excited by Femtosecond Extreme Ultraviolet Radiation
Short-Time Electron Dynamics in Aluminum Excited by Femtosecond Extreme Ultraviolet Radiation
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DOI：
10.1103/physrevlett.107.165003
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发表时间：
2011-10-12
影响因子：
8.6
通讯作者：
Rethfeld, B.
中科院分区：
文献类型：
--
作者：
Medvedev, N.;Zastrau, U.;Rethfeld, B.
通过蒙特卡罗模拟研究了强烈的极紫外脉冲后铝中电子的飞秒动力学。导带电子的瞬态分布显示出几乎热化的低能部分和高能尾部。根据这些数据构建发射光谱，我们发现与测量结果非常吻合。辐射衰变主要反映分布的较冷部分，而高度激发的电子在轫致辐射谱中占主导地位。对于后者，我们还发现预测和测量的能量尺度之间具有良好的一致性。
The femtosecond dynamics of the electrons in aluminum after an intense extreme ultraviolet pulse is investigated by Monte Carlo simulations. Transient distributions of the conduction band electrons show an almost thermalized, low-energy part and a high-energy tail. Constructing emission spectra from these data, we find excellent agreement with measurements. The radiative decay mainly reflects the colder part of the distribution, whereas the highly excited electrons dominate the bremsstrahlung spectrum. For the latter, we also find good agreement between predicted and measured energy scales.