Two-electron photoionization of endohedral atoms

Journal Article · Sun Oct 15 04:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.042712· OSTI ID:20857889

Amusia, M Ya; Liverts, E Z; Mandelzweig, V B ^[1]

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1. Racah Institute of Physics, Hebrew University, Jerusalem 91904 (Israel) and A. F. Ioffe Physical-Technical Institute, St. Petersburg, 194021 (Russian Federation)

Using He-C{sub 60} 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{sigma}{sup ++}({omega})/d{epsilon}. We found that at high photon energy prominent oscillations appear in it due to reflection of the second slow electron wave on the C{sub 60} shell, which 'dies out' at relatively high {epsilon} values, of about 2-3 two-electron ionization potentials. The results were presented for ratios R{sub C{sub 60}}({omega},{epsilon}){identical_to}d{sigma}{sup ++}({omega},{epsilon})/d{sigma}{sup a++}({omega},{epsilon}), where d{sigma}{sup a++}({omega},{epsilon})/d{epsilon} is the two-electron differential photoionization cross section. We have calculated the ratio R{sub i,ful}={sigma}{sub i}{sup ++}({omega})/{sigma}{sub i}{sup a++}({omega}), that accounts for reflection of both photoelectrons by the C{sub 60} shell. We have also calculated the value of two-electron photoionization cross section {sigma}{sup ++}({omega}) and found that this value is close to that of an isolated He atom. Results similar to He-C{sub 60} are presented for He-C{sub 70} and He-C{sub 76}.

• OSTI ID: 20857889
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 74; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
CROSS SECTIONS
ELECTRONS
FULLERENES
HELIUM
IONIZATION POTENTIAL
OSCILLATIONS
PHOTOIONIZATION
PHOTON-ATOM COLLISIONS
PHOTONS
POTENTIALS
REFLECTION