New Journal of Physics (Jan 2015)
Covariance mapping of two-photon double core hole states in C2H2 and C2H6 produced by an x-ray free electron laser
- M Mucke,
- V Zhaunerchyk,
- L J Frasinski,
- R J Squibb,
- M Siano,
- J H D Eland,
- P Linusson,
- P Salén,
- P v d Meulen,
- R D Thomas,
- M Larsson,
- L Foucar,
- J Ullrich,
- K Motomura,
- S Mondal,
- K Ueda,
- T Osipov,
- L Fang,
- B F Murphy,
- N Berrah,
- C Bostedt,
- J D Bozek,
- S Schorb,
- M Messerschmidt,
- J M Glownia,
- J P Cryan,
- R N Coffee,
- O Takahashi,
- S Wada,
- M N Piancastelli,
- R Richter,
- K C Prince,
- R Feifel
Affiliations
- M Mucke
- Department of Physics and Astronomy, Uppsala University, Sweden
- V Zhaunerchyk
- Department of Physics and Astronomy, Uppsala University, Sweden; Department of Physics, University of Gothenburg, Sweden; Department of Physics, AlbaNova University Center, Stockholm University, Sweden
- L J Frasinski
- Department of Physics, Imperial College London, UK
- R J Squibb
- Department of Physics and Astronomy, Uppsala University, Sweden; Department of Physics, University of Gothenburg, Sweden; Department of Physics, Imperial College London, UK
- M Siano
- Department of Physics, Imperial College London, UK
- J H D Eland
- Department of Physics and Astronomy, Uppsala University, Sweden; Department of Chemistry, Oxford University, UK
- P Linusson
- Department of Physics, AlbaNova University Center, Stockholm University, Sweden
- P Salén
- Department of Physics, AlbaNova University Center, Stockholm University, Sweden
- P v d Meulen
- Department of Physics, AlbaNova University Center, Stockholm University, Sweden
- R D Thomas
- Department of Physics, AlbaNova University Center, Stockholm University, Sweden
- M Larsson
- Department of Physics, AlbaNova University Center, Stockholm University, Sweden
- L Foucar
- Advanced Study Group of the Max Planck Society, Hamburg, Germany; Max Planck Institut für medizinische Forschung, Heidelberg, Germany
- J Ullrich
- Max Planck-Institut für Kernphysik, Heidelberg, Germany; Physikalisch-Technische Bundesanstalt, Braunschweig, Germany
- K Motomura
- Institute for Interdisciplinary Material Research, Tohoku University, Sendai, Japan
- S Mondal
- Institute for Interdisciplinary Material Research, Tohoku University, Sendai, Japan
- K Ueda
- Institute for Interdisciplinary Material Research, Tohoku University, Sendai, Japan
- T Osipov
- Department of Physics, Western Michigan University, Kalamazoo, MI, USA
- L Fang
- Department of Physics, Western Michigan University, Kalamazoo, MI, USA; Center for High Energy Density Science, University of Texas, Austin, TX, USA
- B F Murphy
- Department of Physics, Western Michigan University, Kalamazoo, MI, USA
- N Berrah
- Department of Physics, Western Michigan University, Kalamazoo, MI, USA; Department of Physics, University of Connecticut, Storrs, CT, USA
- C Bostedt
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
- J D Bozek
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA; Science Division, Synchrotron SOLEIL, Gif-sur-Yvette, France
- S Schorb
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
- M Messerschmidt
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA; NSF BioXFEL Science and Technology Center, Buffalo, NY, USA
- J M Glownia
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
- J P Cryan
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
- R N Coffee
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
- O Takahashi
- Institute for Sustainable Science and Development, Hiroshima University, Japan
- S Wada
- Department of Physical Science, Hiroshima University, Japan
- M N Piancastelli
- Department of Physics and Astronomy, Uppsala University, Sweden; Laboratoire de Chimie Physique, Matière et Rayonnement (LCPMR), UPMC, Université Paris 06, and CNRS (UMR7614), Paris Cedex, France
- R Richter
- Elettra-Sincrotrone Trieste, Basovizza, Italy
- K C Prince
- Elettra-Sincrotrone Trieste, Basovizza, Italy
- R Feifel
- Department of Physics and Astronomy, Uppsala University, Sweden; Department of Physics, University of Gothenburg, Sweden
- DOI
- https://doi.org/10.1088/1367-2630/17/7/073002
- Journal volume & issue
-
Vol. 17,
no. 7
p. 073002
Abstract
Few-photon ionization and relaxation processes in acetylene (C _2 H _2 ) and ethane (C _2 H _6 ) were investigated at the linac coherent light source x-ray free electron laser (FEL) at SLAC, Stanford using a highly efficient multi-particle correlation spectroscopy technique based on a magnetic bottle. The analysis method of covariance mapping has been applied and enhanced, allowing us to identify electron pairs associated with double core hole (DCH) production and competing multiple ionization processes including Auger decay sequences. The experimental technique and the analysis procedure are discussed in the light of earlier investigations of DCH studies carried out at the same FEL and at third generation synchrotron radiation sources. In particular, we demonstrate the capability of the covariance mapping technique to disentangle the formation of molecular DCH states which is barely feasible with conventional electron spectroscopy methods.
Keywords
