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Charge Exchange and X-Ray Emission Cross Sections for Multiply Charged Ions Colliding with H₂O
Physical Review A
  • Sebastian Otranto, Missouri University of Science and Technology
  • Ronald E. Olson, Missouri University of Science and Technology

Total and state selective nl-electron capture cross sections are presented for highly charged ions Z=4-10, 14, 18, and 26 colliding with water molecules. The energy range investigated was from 10 eV/amu (v=0.02 a.u.) to 100 keV/amu (v=2 a.u.). An initialization for the 1B1 and 3A1 orbitals of the water molecule is introduced based on the one center expansion of Moccia and compared to our previous studies based on a hydrogenic approximation within the microcanonical ensemble. The Z dependence of the calculated total cross sections is in reasonable agreement with the recent data of Mawhorter et al. [Phys. Rev. A 75, 032704 (2007)] and is improved over previous results. The energy dependence of the n- and l-level populations is investigated. The K-shell x-ray emission cross sections are determined by using the calculated state-selective electron capture results as input and then applying hydrogenic branching and cascading values for the photon emission. Our results compare favorably with experimental data from the KVI-Groningen, Jet Propulsion Laboratory and Lawrence Livermore National Laboratory groups.

National Agency for the Promotion of Science and Technology (Argentina)
United States. Department of Energy
Keywords and Phrases
  • X-Ray Emission Spectra,
  • Electron Capture,
  • Ion-Molecule Collisions,
  • Positive Ions,
  • Oxygen,
  • Water
Document Type
Article - Journal
Document Version
Final Version
File Type
© 2008 American Physical Society (APS), All rights reserved.
Publication Date
Citation Information
Sebastian Otranto and Ronald E. Olson. "Charge Exchange and X-Ray Emission Cross Sections for Multiply Charged Ions Colliding with H₂O" Physical Review A (2008)
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