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  Resonance-enhanced multiple ionization of krypton at an x-ray free-electron laser

Rudek, B., Rolles, D., Son, S., Foucar, L., Erk, B., Epp, S., et al. (2013). Resonance-enhanced multiple ionization of krypton at an x-ray free-electron laser. Physical Review A, 87(2): 023413. doi:10.1103/PhysRevA.87.023413.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-251B-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-251C-8
Genre: Journal Article

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PhysRevA.87.023413.pdf (Publisher version), 2MB
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2013
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http://dx.doi.org/10.1103/PhysRevA.87.023413 (Publisher version)
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 Creators:
Rudek, Benedikt1, 2, 3, Author              
Rolles, Daniel1, 3, 4, Author              
Son, Sang−Kil5, Author
Foucar, Lutz1, 4, Author              
Erk, Benjamin1, 2, Author              
Epp, Sascha1, 6, Author              
Boll, Rebecca1, 6, Author              
Anielski, Denis1, 2, 7, Author              
Bostedt, Christoph8, Author
Schorb, Sebastian8, 9, Author
Coffee, Ryan N.8, Author
Bozek, John D.8, Author
Trippel, Sebastian5, Author
Marchenko, Tatiana10, Author
Simon, Marc10, Author
Christensen, Lauge11, Author
De, Shankar12, 13, Author
Wada, Shin−ichi14, Author
Ueda, Kiyoshi15, Author
Schlichting, Ilme1, 4, Author              
Santra, Robin5, 16, AuthorUllrich, Joachim H.1, 6, 17, Author              Rudenko, Artem1, 18, 19, Author               more..
Affiliations:
1Max-Planck-Advanced Study Group at CFEL, DESY, Notkestraße 85, 22607 Hamburg, Germany, ou_persistent22              
2Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany, ou_persistent22              
3DESY, Notkestraße 85, 22607 Hamburg, Germany, ou_persistent22              
4Max-Planck-Institut für medizinische Forschung, Jahnstraße 29, 69120 Heidelberg, Germany, ou_persistent22              
5Center for Free-Electron Laser Science CFEL, DESY, Notkestraße 85, 22607 Hamburg, Germany, ou_persistent22              
6Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society, ou_2025284              
7International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266714              
8SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA, ou_persistent22              
9Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany, ou_persistent22              
10Laboratoire de Chimie Physique-Matière et Rayonnement, UPMC and CNRS, 11 rue Pierre et Marie Curie, 75231 Paris, France, ou_persistent22              
11Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark, ou_persistent22              
12Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark, ou_persistent22              
13Saha Institute of Nuclear Physics, 700064 Kolkata, India, ou_persistent22              
14Department of Physical Science, Hiroshima University, 739-8236 Higashi-Hiroshima, Japan, ou_persistent22              
15IMRAM, Tohoku University, Katahira 2-1-1, Aoba-ku, 980-8577 Sendai, Japan, ou_persistent22              
16Department of Physics, Universität Hamburg, Jungiusstraße 9, 20355 Hamburg, Germany, ou_persistent22              
17Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany, ou_persistent22              
18J. R. Macdonald Laboratory, Kansas State University, 116 Cardwell Hall, Manhattan, Kansas 66506, USA, ou_persistent22              
19Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society, ou_904547              

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Free keywords: PACS numbers: 32.80.Rm, 41.60.Cr, 32.80.Zb
 Abstract: The sequential inner−shell multiple ionization of krypton was investigated at the Linac Coherent Light Source using ion time−of−flight spectroscopy at photon energies above (2 keV) and below (1.5 keV) the L edge with two x−ray pulse lengths (5 and 80 fs, nominally) and various pulse energies. At 2.5 mJ pulse energy, charge states up to Kr17+ were recorded for M−shell ionization and charge states up to Kr21+ for L−shell ionization. Comparing the experimental charge state distribution to Monte Carlo rate−equation calculations, we find a strong enhancement of higher charge states at 2 keV photon energy as compared to the theoretical predictions. This enhancement is explained with a resonant ionization pathway where multiple excitations into outer valence and Rydberg orbitals are followed by autoionization. These resonant pathways play an important role for the photoionization of ions with charge higher than Kr12+, for which direct one−photon L−shell photoionization is energetically impossible at 2 keV photon energy. Only a small pulse−length dependence of the charge state yield is observed at an x−ray pulse energy of 0.4 mJ

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Language(s): eng - English
 Dates: 2013-01-182013-02-192013-02-192013-02-19
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevA.87.023413
 Degree: -

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Title: Physical Review A
  Other : Phys. Rev. A
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 87 (2) Sequence Number: 023413 Start / End Page: - Identifier: ISSN: 1050-2947
CoNE: /journals/resource/954925225012_2