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Double Core-Hole Generation in O2 Molecules Using an X-Ray Free-Electron Laser: Molecular-Frame Photoelectron Angular Distributions
- Kastirke, Gregor;
- Schöffler, Markus S;
- Weller, Miriam;
- Rist, Jonas;
- Boll, Rebecca;
- Anders, Nils;
- Baumann, Thomas M;
- Eckart, Sebastian;
- Erk, Benjamin;
- De Fanis, Alberto;
- Fehre, Kilian;
- Gatton, Averell;
- Grundmann, Sven;
- Grychtol, Patrik;
- Hartung, Alexander;
- Hofmann, Max;
- Ilchen, Markus;
- Janke, Christian;
- Kircher, Max;
- Kunitski, Maksim;
- Li, Xiang;
- Mazza, Tommaso;
- Melzer, Niklas;
- Montano, Jacobo;
- Music, Valerija;
- Nalin, Giammarco;
- Ovcharenko, Yevheniy;
- Pier, Andreas;
- Rennhack, Nils;
- Rivas, Daniel E;
- Dörner, Reinhard;
- Rolles, Daniel;
- Rudenko, Artem;
- Schmidt, Philipp;
- Siebert, Juliane;
- Strenger, Nico;
- Trabert, Daniel;
- Vela-Perez, Isabel;
- Wagner, Rene;
- Weber, Thorsten;
- Williams, Joshua B;
- Ziolkowski, Pawel;
- Schmidt, Lothar Ph H;
- Czasch, Achim;
- Ueda, Kiyoshi;
- Trinter, Florian;
- Meyer, Michael;
- Demekhin, Philipp V;
- Jahnke, Till
- et al.
Published Web Location
https://doi.org/10.1103/physrevlett.125.163201Abstract
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 microscope. By measuring two ions and two electrons in coincidence, we investigate double core-hole generation in O_{2} molecules in the gas phase. Single-site and two-site double core holes have been identified and their molecular-frame electron angular distributions have been obtained for a breakup of the oxygen molecule into two doubly charged ions. The measured distributions are compared to results of calculations performed within the frozen- and relaxed-core Hartree-Fock approximations.
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