Small recoil momenta double ionization of He and two-electron ions by high energy photons

@article{Amusia2020SmallRM,
  title={Small recoil momenta double ionization of He and two-electron ions by high energy photons},
  author={M. Ya. Amusia and Evgenii G. Drukarev and Evgeny Z. Liverts},
  journal={The European Physical Journal D},
  year={2020},
  volume={74}
}
We calculate various differential and double differential characteristics of ionization by a single photon for H−, He and for the two-electron ions with Z = 3, 4, 5 in the region of the so-called quasi-free mechanism (QFM) domination. We employ highly accurate wave functions at the electron-electron coalescence line where coordinates of both ionized electrons coincide. We trace the Z dependence of the double differential distributions. For all considered targets we discuss the dependence of the… 
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