Breakthrough greatly enhances ultrafast resolution achievable with X-ray free-electron lasers
— Read on phys.org/news/2021-03-breakthrough-greatly-ultrafast-resolution-x-ray.html

Breakthrough greatly enhances ultrafast resolution achievable with X-ray free-electron lasers

by Joseph E. Harmon, Argonne National Laboratory

Artistic depiction of XFEL measurement with neon gas. The inherent delay between the emission of photoelectrons and Auger electrons leads to a characteristic ellipse in the analyzed data. In principle, the position of individual data points around the ellipse can be read like the hands of a clock to reveal the precise timing of decay processes. Credit: Daniel Haynes and Jörg Harms/Max Planck Institute for the Structure and Dynamics of Matter.