Time-dependent R-matrix theory applied to two-photon double ionization of He
Abstract
We introduce a time-dependent R-matrix theory generalised to describe double ionization processes. The method is used to investigate two-photon double ionization of He by intense XUV laser radiation. We combine a detailed B-spline-based wavefunction description in a extended inner region with a single-electron outer region containing channels representing both single ionization and double ionization. A comparison of wavefunction densities for different box sizes demonstrates that the flow between the two regions is described with excellent accuracy. The obtained two-photon double ionization cross sections are in excellent agreement with other cross sections available. Compared to calculations fully contained within a finite inner region, the present calculations can be propagated over the time it takes the slowest electron to reach the boundary.
Keywords
Cite
@article{arxiv.1404.6467,
title = {Time-dependent R-matrix theory applied to two-photon double ionization of He},
author = {H. W. van der Hart},
journal= {arXiv preprint arXiv:1404.6467},
year = {2014}
}
Comments
6 pages, 4 figures