Table of Contents
Journal of Atomic, Molecular, and Optical Physics
Volume 2011, Article ID 817034, 6 pages
http://dx.doi.org/10.1155/2011/817034
Research Article

Double Photoionization of Endohedrally Confined Atoms

1División Colisiones Atómicas, Centro Atómico Bariloche and Conicet, Río Negro 8400 S. C. de Bariloche, Argentina
2Departamento de Física, Instituto de Astronomía y Física del Espacio, Universidad de Buenos Aires and CONICET, 1428 Buenos Aires, Argentina

Received 29 September 2010; Accepted 7 December 2010

Academic Editor: Roberto Daniel Rivarola

Copyright © 2011 F. D. Colavecchia et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We study the double electronic emission by photon impact from ground state of two-electron atoms in the center of a model spherical fullerene, which is described by a square-well shell. Cross-sections for different well depth are computed within a separable model for the final state, and a configuration interaction state for the initial one. Triple differential cross-sections show a strong dependence on the well depth and on the energy of the emitted electrons, due to the delocalization of the electrons in the initial state. The fullerene potential also allows higher angular momenta partial waves to be included in the process, which modifies the well-known two-lobe cross-section from isolated atom.