Ultrafast time-resolved X-ray absorption spectroscopy at FemtoMAX beamline

Area of Science:

• Chemical Physics
• Materials Science
• Spectroscopy

Background:

• Ultrafast spectroscopy is crucial for understanding molecular dynamics.
• Advanced X-ray absorption spectroscopy (XAS) techniques are needed for detailed structural and electronic information.

Purpose of the Study:

• To report the development and initial experiments of a new XAS endstation.
• To demonstrate the capability for femtosecond time-resolved measurements on solvated molecules.

Main Methods:

• Utilized the FemtoMAX beamline at MAX IV Laboratory.
• Performed femtosecond time-resolved XAS measurements.
• Focused on solvated photoexcited molecular systems.

Main Results:

• Achieved pulse-width-limited temporal resolution.
• Demonstrated nearly shot-noise-limited signal quality.
• Showcased the ability to extract detailed electronic and geometric structural information.

Conclusions:

• The new XAS endstation is a powerful tool for ultrafast molecular science.
• The system enables high-fidelity investigations of transient molecular states.
• This development advances the study of photoexcited molecular systems.