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 BykovaVictoria 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
- dual energy
- electron microscopy
- high speed
- single molecule
- electronic health record
- optical coherence tomography
- computed tomography
- solid state
- primary care
- big data
- healthcare
- ionic liquid
- electron transfer
- solar cells
- data analysis
- magnetic resonance
- artificial intelligence
- quality improvement
- blood brain barrier
- energy transfer