Two-Electron Photoionization Cross Sections at High Energies

  • M. Ya. Amusia
  • R. Krivec
  • V. B. Mandelzweig
Conference paper
Part of the Few-Body Systems book series (FEWBODY, volume 14)


Double and single electron photoionization cross sections and their ratios at high and ultra-relativistic energies are calculated for H, He and helium-like ions in ground and excited states including triplet states. The ratios contain shake-off and quasi-free terms. A high precision non-variational wave function is used. The quasi-free mechanism increases the ratios impressively: for He we get 0.0762 instead of 0.0164 in the non-relativistic case. Ratios are inversely proportional to Z 2, with a factor increasing from 0.094 in the non-relativistic to 0.595 in the ultra-relativistic limit.


Photoionization Cross Section Final State Interaction Isoelectronic Sequence Ground State Correlation Excited Initial State 
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Copyright information

© Springer-Verlag/Wien 2003

Authors and Affiliations

  • M. Ya. Amusia
    • 1
    • 2
  • R. Krivec
    • 3
  • V. B. Mandelzweig
    • 1
  1. 1.Racah Institute of PhysicsThe Hebrew UniversityJerusalemIsrael
  2. 2.Ioffe Physico-Technical InstituteSt. PetersburgRussia
  3. 3.J. Stefan InstituteLjubljanaSlovenia

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