Time-resolved x-ray absorption spectroscopy

X-ray Absorption Spectroscopy has proved to be a powerful tool to elucidate a huge number of questions in materials science. The authors discuss their interest in time-resolved experiments achieved with extreme energy resolution and energy scale stability to take a full benefit of the strong correlation between the stereochemical environment of the absorbing atom and the exact shape and position of the absorption edge. Fast energy dispersive x-ray spectroscopy allows in-situ observations with data collected in a short time. The main limitation concerns very low-concentration samples since it is no longer possible to use the dispersive geometry because detection of the signal via the decay channels is no more possible