Two-electron photoionization of endohedral atoms

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 ap...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2006-10, Vol.74 (4), Article 042712
Main Authors: Amusia, M. Ya, Liverts, E. Z., Mandelzweig, V. B.
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
ATOMS
CROSS SECTIONS
ELECTRONS
FULLERENES
HELIUM
IONIZATION POTENTIAL
OSCILLATIONS
PHOTOIONIZATION
PHOTON-ATOM COLLISIONS
PHOTONS
POTENTIALS
REFLECTION
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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}.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.74.042712