Resonant Auger effect at high x-ray intensity
Resonant Auger effect at high x-ray intensity
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DOI：
10.1103/physreva.77.053404
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发表时间：
2008-05-01
影响因子：
2.9
通讯作者：
Santra, Robin
中科院分区：
文献类型：
--
作者：
Rohringer, Nina;Santra, Robin
本文讨论了氖原子在强X射线辐照下与1 s-> 3 p跃迁共振的俄歇效应。高强度意味着X射线峰值强度足以（类似于10（18）W/cm（2））在内壳层空位的弛豫寿命内在氖基态和Is 1 s（-1 3 p（P-1）态之间引起拉比振荡。对于所提出的数值分析，一个有效的两级模型，包括共振俄歇衰减过程的描述，采用。相干和混沌的X射线脉冲的治疗。后者用于模拟基于自放大自发辐射原理的x射线自由电子激光器的辐射。在时间域中观察X射线驱动的原子布居动力学对于混沌脉冲系综是具有挑战性的。对于使用X射线自由电子激光的实验来说，一个更实际的选择是测量共振俄歇电子动能分布中的线轮廓，这提供了原子布居动力学和X射线脉冲特性的信息。
The resonant Auger effect of atomic neon exposed to high-intensity x-ray radiation in resonance with the 1s -> 3p transition is discussed. High intensity here means that the x-ray peak intensity is sufficient (similar to 10(18) W/cm(2)) to induce Rabi oscillations between the neon ground state and the is 1s(-1)3p (P-1) state within the relaxation lifetime of the inner-shell vacancy. For the numerical analysis presented, an effective two-level model, including a description of the resonant Auger decay process, is employed. Both coherent and chaotic x-ray pulses are treated. The latter are used to simulate radiation from x-ray free-electron lasers based on the principle of self-amplified spontaneous emission., Observing x-ray-driven atomic population dynamics in the time domain is challenging for chaotic pulse ensembles. A more practical option for experiments using x-ray free-electron lasers is to measure the line profiles in the kinetic energy distribution of the resonant Auger electron. This provides information on both atomic population dynamics and x-ray pulse properties.