Double Photoionization of Endohedrally Confined Atoms
Figure 1
(Color online) Threefold differential cross-section (TDCS) for ionization of the helium ground state in a fullerene cage, as a function of the angle of one of the ejected electrons . The other one is ejected at , fixed respect to the polarization . The polarization vector is set along the -axis, and the impinging light towards the page. The electrons are ejected with equal energy eV. Dotted (orange) and solid (blue) lines represent the ground and excited state energy as a function of , respectively. TDCS are shown for both excited (a, b, c) and ground states (d, e, f) and computed with a pure Coulomb final state, dashed (red) line or with exact potential including fullerene cage, solid (black) line. They are shown for a.u. (triangles), a.u. (squares) and a.u. (circles). All TDCS are rescaled to one at maxima.
