With time-resolved soft X-ray spectroscopy, the element-specific dynamics of the electronic structure of disordered systems can be investigated. Measurements of species in dilute liquid solutions are particularly challenging and require high photon flux combined with low experimental noise. This mostly limited these experiments to large-scale facilities, especially for energies above the water window (533 eV). Based on a laser-produced plasma source, our system enables, to the best of our knowledge, the first static and transient experiments in the liquid phase to be performed in the laboratory for energies up to 1400 eV and with a time resolution of 500 ps. We benchmark the system with static investigations of [Ni(CN)4]2− and transient experiments on the widely used model complex [Fe(bpy)3]2+, both in an aqueous solution. The introduced self-referencing concept ensures that the measurements are photon noise limited. Our results form the basis for further liquid-phase experiments investigating the dynamics in diluted solutions.

中文翻译：

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使用激光产生的等离子体源进行液相瞬态吸收实验的实验室软 ​​X 射线装置


利用时间分辨软 X 射线光谱，可以研究无序系统电子结构的元素特定动力学。稀液体溶液中物质的测量尤其具有挑战性，需要高光子通量和低实验噪声。这主要限制了这些实验的大型设施，特别是对于高于水窗（533 eV）的能量。据我们所知，我们的系统基于激光产生的等离子体源，能够在实验室中进行首次液相静态和瞬态实验，能量高达 1400 eV，时间分辨率为 500 ps 。我们通过 [Ni(CN)2] 的静态研究对系统进行基准测试4 ] 2−以及广泛使用的模型复合物 [Fe(bpy) 3 ] 2+ ，均在水溶液中。引入的自参考概念确保测量受到光子噪声的限制。我们的结果为进一步研究稀释溶液动力学的液相实验奠定了基础。