Linac coherent light source: The first five years

C Bostedt, S Boutet, DM Fritz, Z Huang, HJ Lee… - Reviews of Modern …, 2016 - APS
A new scientific frontier opened in 2009 with the start of operations of the world's first x-ray
free-electron laser (FEL), the Linac Coherent Light Source (LCLS), at SLAC National …

Double-core-hole spectroscopy for chemical analysis with an intense X-ray femtosecond laser

N Berrah, L Fang, B Murphy, T Osipov… - Proceedings of the …, 2011 - National Acad Sciences
Theory predicts that double-core-hole (DCH) spectroscopy can provide a new powerful
means of differentiating between similar chemical systems with a sensitivity not hitherto …

[HTML][HTML] Excited states via coupled cluster theory without equation-of-motion methods: Seeking higher roots with application to doubly excited states and double core …

J Lee, DW Small, M Head-Gordon - The Journal of chemical physics, 2019 - pubs.aip.org
In this work, we revisited the idea of using the coupled-cluster (CC) ground state formalism
to target excited states. Our main focus was targeting doubly excited states and double core …

Experimental verification of the chemical sensitivity of two-site double core-hole states formed by an x-ray free-electron laser

P Salén, P van der Meulen, HT Schmidt, RD Thomas… - Physical review …, 2012 - APS
We have performed x-ray two-photon photoelectron spectroscopy using the Linac Coherent
Light Source x-ray free-electron laser in order to study double core-hole (DCH) states of CO …

Multi-electron coincidence spectroscopy: double photoionization from molecular inner-shell orbitals

P Lablanquie, F Penent… - Journal of Physics B …, 2016 - iopscience.iop.org
The interest of molecular double core holes was predicted in 1986 by Cederbaum et al who
showed that their spectroscopy can be more informative than that of single core holes …

Double-core-hole states in neon: Lifetime, post-collision interaction, and spectral assignment

G Goldsztejn, T Marchenko, R Püttner, L Journel… - Physical review …, 2016 - APS
Using synchrotron radiation and high-resolution electron spectroscopy, we have directly
observed and identified specific photoelectrons from K− 2 V states in neon corresponding to …

Double Core-Hole Generation in Molecules Using an X-Ray Free-Electron Laser: Molecular-Frame Photoelectron Angular Distributions

G Kastirke, MS Schöffler, M Weller, J Rist, R Boll… - Physical review …, 2020 - APS
We report on a multiparticle coincidence experiment performed at the European X-ray Free-
Electron Laser at the Small Quantum Systems instrument using a COLTRIMS reaction …

Evidence of Single-Photon Two-Site Core Double Ionization of Molecules

P Lablanquie, TP Grozdanov, M Žitnik, S Carniato… - Physical review …, 2011 - APS
We observe the formation in a single-photon transition of two core holes, each at a different
carbon atom of the C 2 H 2 molecule. At a photon energy of 770.5 eV, the probability of this 2 …

Single Photon K-2 and K-1 K-1 Double Core Ionization in C 2 H 2 n (n<? format?>=<? format?> 1–3), CO, and N 2<? format?> as a Potential New Tool for Chemical …

M Nakano, F Penent, M Tashiro, TP Grozdanov… - Physical review …, 2013 - APS
We have observed single photon double K-shell photoionization in the C 2 H 2 n (n= 1–3)
hydrocarbon sequence and in N 2 and CO, using synchrotron radiation and electron …

Transient responses of double core-holes generation in all-attosecond pump-probe spectroscopy

J Liu, Y Li, Y Hou, J Wu, J Yuan - Scientific Reports, 2024 - nature.com
Double core-holes (DCHs) show remarkable and sensitive effects for understanding
electron correlations and coherence. With advanced modulation of x-ray free-electron laser …