Abstract
We have developed a two-electron outer region for use within -matrix theory to describe double ionization processes. The capability of this method is demonstrated for single-photon double ionization of He in the photon energy region between 80 and 180 eV. The cross sections are in agreement with established data. The extended -matrix with time dependence method also provides information on higher-order processes, as demonstrated by the identification of signatures for sequential double ionization processes involving an intermediate state with .
- Received 2 April 2015
DOI:https://doi.org/10.1103/PhysRevA.92.022504
©2015 American Physical Society