Transient X-Ray Absorption Near Edge Structure Spectroscopy Using Broadband Free-Electron Laser Pulses.
Pavle JuranićClaudio CirelliTalgat MamyrbayevYohei UemuraJoan Vila-ComamalaFrederico Alves LimaCamila BacellarPhilip J M JohnsonEduard PratSven ReicheAnna WachIuliia BykovaAbdullah KahramanVictoria KabanovaChristopher MilneChristian DavidPublished in: Small methods (2024)
A new method for time-resolved X-ray absorption near edge structure (XANES) spectroscopy that enables faster data acquisition and requires smaller sample quantities for high-quality data, thus allowing the analysis of more samples in a shorter time is introduced. The method uses large bandwidth free electron laser pulses to measure laser-excited XANES spectra in transmission mode. A beam-splitting grating configuration allows simultaneous measurements of the spectra of the incoming X-ray Free Electron Laser (XFEL) pulses and transmission XANES, which is crucial for compensating the pulse-dependent intensity and spectrum fluctuations due to the self-amplified spontaneous emission operation. The implementation of this new methodology is applied on a liquid solution of ammonium iron(III) oxalate jet and is compared to previous results, showing great improvements in the speed of acquisition and spectral resolution, and the ability to measure a large 2-D spectral-time map quickly.
Keyphrases
- high resolution
- electron microscopy
- dual energy
- high speed
- single molecule
- optical coherence tomography
- computed tomography
- primary care
- solid state
- healthcare
- blood pressure
- big data
- ionic liquid
- density functional theory
- solar cells
- electron transfer
- high frequency
- high intensity
- data analysis
- deep learning
- cerebral ischemia
- high density
- high efficiency
- monte carlo