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Ultrafast X-ray Photochemistry at European XFEL: Capabilities of the Femtosecond X-ray Experiments (FXE) Instrument

机译:UltraFast X射线光化在欧洲XFEL:飞秒X射线实验的能力(FXE)仪器

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摘要

Time-resolved X-ray methods are widely used for monitoring transient intermediates over the course of photochemical reactions. Ultrafast X-ray absorption and emission spectroscopies as well as elastic X-ray scattering deliver detailed electronic and structural information on chemical dynamics in the solution phase. In this work, we describe the opportunities at the Femtosecond X-ray Experiments (FXE) instrument of European XFEL. Guided by the idea of combining spectroscopic and scattering techniques in one experiment, the FXE instrument has completed the initial commissioning phase for most of its components and performed first successful experiments within the baseline capabilities. This is demonstrated by its currently 115 fs (FWHM) temporal resolution to acquire ultrafast X-ray emission spectra by simultaneously recording iron Kα and Kβ lines, next to wide angle X-ray scattering patterns on a photoexcited aqueous solution of [Fe(bpy)3]2+, a transition metal model compound.
机译:时间分辨的X射线方法广泛用于监测光化学反应过程中的瞬态中间体。超快X射线吸收和发射光谱以及弹性X射线散射,提供了解决溶液相中化学动力学的详细电子和结构信息。在这项工作中,我们描述了欧洲XFEL的飞秒X射线实验(FXE)仪器的机会。通过在一个实验中结合光谱和散射技术的想法,FXE仪器已经完成了大多数组件的初始调试阶段,并在基线能力内进行了第一个成功的实验。这通过其目前的115fs(fwhm)时间分辨率来证明通过同时记录铁kα和kβ线来获取超快X射线发射光谱,在[Fe(BPY)的光透镜水溶液上宽角X射线散射图案。 3] 2+,过渡金属模型化合物。

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