Asymptotic behavior of photoionization cross section in a central field. Ionization of the p states

  • E. G. DrukarevEmail author
  • A. I. Mikhailov
Regular Article


We continue our studies of the high energy nonrelativistic asymptotics for the photoionization cross section of the systems bound by a central field V(r). We consider the bound states with the orbital momentum 𝓁 = 1. We show, that as well as for the s states the asymptotics can be obtained without solving of the wave equations for the bound and outgoing electrons. The asymptotics of the cross sections is expressed in terms of the asymptotics of the Fourier transform V(p) of the potential and its derivative V’(p) by employing the Lippmann–Schwinger equation. The shape of the energy dependence of the cross sections is determined by the analytical properties of the potential V(r). The cross sections exhibit power drop with the increase of the photon energy for the potentials V(r) which have singularities on the real axis. They experience exponential drop if V(r) has poles in the complex plane. We trace the energy dependence of the ratios of the photoionization cross sections for s and p electrons from the states with the same principle quantum number. We apply the results to the physics of fullerenes.

Graphical abstract


Atomic Physics 


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© EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.National Research Center “Kurchatov Institute” B.P. Konstantinov Petersburg Nuclear Physics Institute GatchinaSt. PetersburgRussia

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