Two-electron photoionization of endohedral atoms

M. Ya Amusia*, E. Z. Liverts, V. B. Mandelzweig

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Using He@ C60 as an example, we demonstrate that the static potential of the fullerene core essentially alters the cross section of the two-electron ionization differential in one-electron energy d σ++ (ω) dε. We found that at high photon energy prominent oscillations appear in it due to reflection of the second slow electron wave on the C60 shell, which "dies out" at relatively high ε values, of about 2-3 two-electron ionization potentials. The results were presented for ratios R C60 (ω,ε) d σ++ (ω,ε) d σa++ (ω,ε), where d σa++ (ω,ε) dε is the two-electron differential photoionization cross section. We have calculated the ratio Ri,ful = σi ++ (ω) σi a++ (ω), that accounts for reflection of both photoelectrons by the C60 shell. We have also calculated the value of two-electron photoionization cross section σ++ (ω) and found that this value is close to that of an isolated He atom. Results similar to He@ C60 are presented for He@ C70 and He@ C76.

Original languageEnglish
Article number042712
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume74
Issue number4
DOIs
StatePublished - 2006

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